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Bidentate and tetradentate chalcogen bonding host systems with SeCF3 functions as σ-hole donors in close proximity at the alkyne functions of 1,8-diethynylanthracene and its syn-dimer were prepared in quantitative yield by tin-selenium exchange reactions of the corresponding trimethylstannyl precursors with ClSeCF3. The bidentate system shows chalcogen bonding interactions with THF, but does not bind halide ions. The tetradentate system cooperatively chelates chloride, bromide and iodide ions with its four C≡C–SeCF3 units by rotating the four σ-holes towards the halide ion. The structures of these halide ion adducts were determined by X-ray diffraction. The hydrobromide and -iodide salts of the ethyl derivative of Schwesinger's phosphazene superbase served as halide salts with very weakly coordinating cations. [ABSTRACT FROM AUTHOR]

Phosphoranides comprising three phosphorus carbon bonds are scarcely represented in the literature. We now utilized tris(pentafluoroethyl)phosphane, P(C2F5)3, and cyanobis(pentafluoroethyl)phosphane, P(C2F5)2(CN), featuring electron withdrawing pentafluoroethyl groups, to synthesize such compounds. Metal fluorides MF (M=Ag, Cs) add to P(C2F5)3 yielding respective M[P(C2F5)3F] salts. Those M[P(C2F5)3F] subsequently suffer a loss of C2F4, furnishing M[P(C2F5)2F2]. The cesium salt decomposes instantaneously when warmed to rt, whereas the silver salt decomposes slowly over several days at rt. Treatment of Ag[P(C2F5)3F] with 2,2'‐bipyridine facilitated the isolation and structural characterization of [Ag(bipy){P(C2F5)3F}]. With P(C2F5)2(CN), AgF reacts under substitution of the cyano group yielding P(C2F5)2F, rather than phosphoranide formation. However, [K(18‐crown‐6)]F adds to P(C2F5)2(CN) furnishing [K(18‐crown‐6)][P(C2F5)2(CN)F]. Its structural characterization was successful, despite its tendency to undergo an exchange of substituents, yielding [K(18‐crown‐6)][P(C2F5)2F2] and presumably [K(18‐crown‐6)][P(C2F5)2(CN)2]. The latter forms an equilibrium with [K(18‐crown‐6)]CN and P(C2F5)2(CN) which lies well on side of the phosphane and cyanide salt. [ABSTRACT FROM AUTHOR]

Compounds exhibiting main group elements in low oxidation states were found to mimic the reactivity of transition metal complexes. Like the latter, such main group species show a proclivity of changing their oxidation state as well as their coordination number by +2, therefore fulfilling the requirements for oxidative additions. Prominent examples of such main group compounds that undergo oxidative additions with organohalides R−X (R=alkyl, aryl, X=F, Cl, Br, I) are carbenes and their higher congeners. Aluminyl anions, which like carbenes and silylenes oxidatively add to strong σ‐bonds in R−X species, have been recently discovered. We present the first anion based upon a Group 14 element, namely the tris(pentafluoroethyl)silanide anion, [Si(C2F5)3]−, which is capable of oxidative additions towards C−F bonds. This enables the isolation of non‐chelated tetraorganofluorosilicate salts, which to the best of our knowledge had only been observed as reactive intermediates before. [ABSTRACT FROM AUTHOR]

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While alkyl‐substituted siloxanes are widely known, virtually nothing is known about perfluoroalkyl siloxanes and their congener species, the silanols and silanolates. We recently reported on the tris(pentafluoroethyl)silanide ion, [Si(C2F5)3]−, which features Lewis amphoteric character deriving from the pentafluoroethyl substituents and their strong electron‐withdrawing properties. Transferring this knowledge, we investigated the Lewis amphoteric behavior of the tris(pentafluoroethyl)silanolate, [Si(C2F5)3O]−. In order to examine such Lewis amphoteric behavior, we first developed a strategy for the synthesis of the corresponding silanol Si(C2F5)3OH, which readily condenses at room temperature to the hexakis(pentafluoroethyl)disiloxane, (C2F5)3SiOSi(C2F5)3. Deprotonation of Si(C2F5)3OH employing a sterically demanding phosphazene base allows the characterization of the first example of a dimeric triorganosilanolate: the dianionic hexakis(pentafluoroethyl)disilanolate, [{Si(C2F5)3O}2]2−, implies Lewis amphoteric character of the monomeric [Si(C2F5)3O]− anion. [ABSTRACT FROM AUTHOR]

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In this work, the syntheses of non‐coordinated electron‐rich phenolate anions via deprotonation of the corresponding alcohols with an extremely powerful perethyl tetraphosphazene base (Schwesinger base) are reported. The application of uncharged phosphazenes renders the selective preparation of anionic phenol‐phenolate and phenolate hydrates possible, which allows for the investigation of hydrogen bonding in these species. Hydrogen bonding brings about decreased redox potentials relative to the corresponding non‐coordinated phenolate anions. The latter show redox potentials of up to −0.72(1) V vs. SCE, which is comparable to that of zinc metal, thus qualifying their application as organic zinc mimics. We utilized phenolates as reducing agents for the generation of radical anions in addition to the corresponding phenoxyl radicals. A tetracyanoethylene radical anion salt was synthesized and fully characterized as a representative example. We also present the activation of sulfur hexafluoride (SF6) with phenolates in a SET reaction, in which the nature of the respective phenolate determines whether simple fluorides or pentafluorosulfanide ([SF5]−) salts are formed. [ABSTRACT FROM AUTHOR]

The reaction of the strong monophosphazene base with the weakly acidic phenol leads to the formation of a phenol–phenolate anion with a moderately strong hydrogen bond. Application of the more powerful tetraphosphazene base (Schwesinger base) renders the isolation of the corresponding salt with a free phenolate anion possible. This compound represents the first species featuring the free phenolate anion [H5C6‐O]−. The deprotonation of phenol derivatives with tetraphosphazene bases represents a great way for the clean preparation of salts featuring free phenolate anions and in addition allows the selective syntheses of hydrogen bonded phenol‐phenolate salts. This work presents a phosphazenium phenolate salt with a redox potential of −0.72 V and its capability for the selective activation of the chemically inert greenhouse gas SF6. The performed two‐electron reduction of SF6 leads to phosphazenium pentafluorosulfanide ([SF5]−) and fluoride salts. [ABSTRACT FROM AUTHOR]

The reaction of a saline phosphazenium hydroxide hydrate with siloxanes led to a novel kind of silanol‐silanolate anions. The weakly coordinating behavior of the cation renders the formation of silanol‐silanolate hydrogen bonds possible, which otherwise suffer from detrimental silanolate–oxygen cation interactions. We investigated the influence of various weakly coordinating cations on silanol‐silanolate motifs, particularly with regard to different cation sizes. While large cations favor the formation of intramolecular hydrogen bonds resulting in cyclic structures, the less bulky tetramethyl ammonium cation encourages the formation of polyanionic silanol‐silanolate chains in the solid state. [ABSTRACT FROM AUTHOR]

While perfluorinated aryl, aryloxy and alkoxy aluminum species are well‐established as weakly coordinating anions (WCAs), corresponding perfluoroalkyl aluminum derivatives are virtually unknown. Reaction of Si(C2F5)3CH3 with Li[AlH4] afforded the tetrakis(pentafluoroethyl)aluminate, [Al(C2F5)4]−. Several salts of the [Al(C2F5)4]− ion were synthesized and characterized by NMR spectroscopic methods, mass spectrometry, X‐ray diffraction studies and elemental analysis. [ABSTRACT FROM AUTHOR]

We report on the first examples of isolated silanol–silanolate anions, obtained by utilizing weakly coordinating phosphazenium counterions. The silanolate anions were synthesized from the recently published phosphazenium hydroxide hydrate salt with siloxanes. The silanol–silanolate anions are postulated intermediates in the hydroxide‐mediated polymerization of aryl and alkyl siloxanes. The silanolate anions are strong nucleophiles because of the weakly coordinating character of the phosphazenium cation, which is perceptible in their activity in polysiloxane depolymerization. [ABSTRACT FROM AUTHOR]

The reaction of a strongly basic phosphazene (Schwesinger base) with water afforded the corresponding metastable hydroxide trihydrate [OH(OH2)3]− salt. This is the first hydroxide solvate that is not in contact with a cation and furthermore one of rare known water‐stabilized hydroxide anions. Thermolysis in vacuum results in the decomposition of the hydroxide salt and quantitative liberation of the free phosphazene base. This approach was used to synthesize the Schwesinger base from its hydrochloride salt after anion exchange in excellent yields of over 97 %. This deprotonation method can also be used for the phosphazene‐base‐catalyzed preparation of the Ruppert–Prakash reagent Me3SiCF3 using fluoroform (HCF3) as the trifluoromethyl building block and sodium hydroxide as the formal deprotonation agent. [ABSTRACT FROM AUTHOR]

In this contribution the syntheses of transition metal complexes of the electron‐withdrawing Sn(C2F5)3 ligand are presented. The reaction of HSn(C2F5)3 with organometallics LnM–R (M = Zn, W, Mo; R = Et, Me; L = CO, Cp), metal carbonyls [Ni(CO)4], and [{Fe(CO)2Cp}2], as well as chloro complexes such as [TiCl2Cp2], furnished the corresponding stannylated compounds. The electron‐deficient Sn(C2F5)3 ligand significantly influences the IR spectroscopic and structural features with respect to related non‐fluorinated stannyl complexes. [ABSTRACT FROM AUTHOR]

The reaction of the industrial product (C2F5)3PF2 with LiAlH4 in THF solution selectively furnished the hydridophosphate anion [P(C2F5)3F2H]-. The compound [PPh4][P(C2F5)3F2H] is obtained as a colorless solid on a multigram scale by salt metathesis in aqueous THF. Combining [P(C2F5)3F2H]- with various imidazolium and pyridinium cations affords ionic liquids with melting points well below room temperature. (C2F5)3PF2 also abstracts hydrides from amines, affording the hydridophosphate anion [P(C2F5)3F2H]- and the corresponding imminium cations which add a second amine moiety by intra- or intermolecular adduct formation. [ABSTRACT FROM AUTHOR]

Syntheses of salts containing the tris(pentafluoroethyl)stannate(II) ion, [Sn(C2F5)3]−, were achieved through deprotonation of the corresponding stannane, HSn(C2F5)3, as well as by direct pentafluoroethylation of SnCl2 with LiC2F5. The electron-withdrawing substituents have substantial influence on the stability and reactivity of the anion as documented by its treatment with main group halides. Alkyl halides (R−X) underwent nucleophilic substitutions to afford RSn(C2F5)3, whereas Si, Ge, Sn, P halides gave rise to oxidation processes yielding hypervalent [SnX2(C2F5)3]− salts (X=Cl, Br, I). Moreover the unsymmetrical distannane, nBu3SnSn(C2F5)3, was disclosed as an alternative precursor for the Sn(C2F5)3 moiety. Although neither the solid state structure nor its spectra in alkane solution reveal unexpected peculiarities, unusual dissociation of the compound in coordinating solvents into [ nBu3Sn(D) n]+ and [Sn(C2F5)3]− ions was observed. [ABSTRACT FROM AUTHOR]

Keywords: Anions; hypervalent compounds; P ligands; perfluoroalkyl groups; phosphoranides EN Anions hypervalent compounds P ligands perfluoroalkyl groups phosphoranides 1 1 1 07/28/23 20230701 NES 230701 B The cover image shows b two cyanofluorobis(pentafluoroethyl)phosphoranide anions, [P(C SB 2 sb F SB 5 sb ) SB 2 sb (CN)F] SP - sp , as spaceships. Anions, hypervalent compounds, P ligands, perfluoroalkyl groups, phosphoranides. [Extracted from the article]

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Fluorine, Oxidative Addition, Perfluorosilicates, Silanide Anion, Silicon Frontispiece: Oxidative Additions of C-F Bonds to the Silanide Anion [Si(C2F5)3]- Keywords: Fluorine; Oxidative Addition; Perfluorosilicates; Silanide Anion; Silicon EN Fluorine Oxidative Addition Perfluorosilicates Silanide Anion Silicon 1 1 1 04/14/22 20220419 NES 220419 B Silicon b In their Research Article (e202116468), Berthold Hoge et al. report oxidative additions of [Si(C SB 2 sb F SB 5 sb ) SB 3 sb ] SP - sp to aryl- and alkenylfluorides, enabling the isolation of tetraorganofluorosilicate salts devoid of chelating ligands. [Extracted from the article]

Keywords: Lewis amphoteric; perfluoroalkyls; silicon; silanolates; silanol; siloxanes EN Lewis amphoteric perfluoroalkyls silicon silanolates silanol siloxanes 11018 11018 1 08/04/21 20210802 NES 210802 B The tris(pentafluoroethyl)silanol b , Si(C SB 2 sb F SB 5 sb ) SB 3 sb OH, flashes out of the shadows of silanol derivatives in the cover image, paving the way to its disiloxane and disilanolate. Lewis amphoteric, perfluoroalkyls, silicon, silanolates, silanol, siloxanes Cover Feature: Tris(pentafluoroethyl)silanol Derivatives and the Lewis Amphoteric Tris(pentafluoroethyl)silanolate Anion, [Si(C2F5)3O]- (Chem. Eur. J. 43/2021). [Extracted from the article]

Cover Feature: Non-coordinated and Hydrogen Bonded Phenolate Anions as One-Electron Reducing Agents (Chem. Eur. J. 21/2021) Hydrogen bond, phenol, phenolate, radical anion, SF6 activation Keywords: hydrogen bond; phenol; phenolate; radical anion; SF6 activation EN hydrogen bond phenol phenolate radical anion SF6 activation 6356 6356 1 04/16/21 20210412 NES 210412 B The superbasic tetraphosphazene b is a thieving magpie on the hunt for the shiny proton. [Extracted from the article]

Keywords: hydrogen bond; phenol; phosphazene base; SF6 activation; weakly coordinating cation EN hydrogen bond phenol phosphazene base SF6 activation weakly coordinating cation 6357 6357 1 04/16/21 20210412 NES 210412 B The non-coordinated phenolate anion ([H SB 5 sb C SB 6 sb -O] SP - sp b is easily accessible by deprotonation of phenol with the superbasic perethyl tetraphosphazene Schwesinger base, while monophosphazenes only deliver the hydrogen-bonded phenol-phenolate adduct. Hydrogen bond, phenol, phosphazene base, SF6 activation, weakly coordinating cation Cover Feature: Non-Coordinated Phenolate Anions and Their Application in SF6 Activation (Chem. Eur. J. 21/2021). [Extracted from the article]

The -fluorine atom of the iminium cation [Et SB 2 sb N=CF-CHF-CF SB 3 sb ] SP + sp is labile towards substitution. The cover picture shows the zwitterionic iminium phosphate [P(C SB 2 sb F SB 5 sb ) SB 2 sb F SB 3 sb {C(NEt SB 2 sb )(CHF-CF SB 3 sb )] obtained by the reaction of Ishikawa's reagent Et SB 2 sb N-CF SB 2 sb -CHF-CF SB 3 sb with the Lewis-acidic P(C SB 2 sb F SB 5 sb ) SB 2 sb F. The fluorinating Ishikawa's reagent most likely transfers a fluoride ion onto the phosphorus center, transiently forming [Et SB 2 sb N=CF-CHF-CF SB 3 sb ][P(C SB 2 sb F SB 5 sb ) SB 2 sb F SB 2 sb ]. Cover Feature: Ishikawa's Reagent - a Valuable Source for Fluoroorganic Iminium Salts (Z. Anorg. [Extracted from the article]

Copyright of Angewandte Chemie is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Frontispiz: Synthese und Reaktivität der ersten isolierten wasserstoffverbrückten Silanol-Silanolat-Anionen Keywords: Phosphazen; Schwach koordinierende Kationen; Silanolat; Silicon; Siloxan DE Phosphazen Schwach koordinierende Kationen Silanolat Silicon Siloxan 1 1 1 03/23/20 20200327 NES 200327 B Siliciumverbindungen b Isolierte Silanolat-Anionen wurden von B. Hoge et al. in ihrer Zuschrift auf S. 5536 durch Reaktion von Phosphazenium-Hydroxid-Hydrat-Salzen mit Siloxanen synthetisiert. Der schwach koordinierende Charakter des Kations führt zu einer starken Nukleophilie des Anions und damit zu Silanol-Silanolat-H-Brücken. [Extracted from the article]

Rücktitelbild: Generierung und Anwendung des Hydroxid-Trihydrat-Anions, [OH(OH2)3]-, stabilisiert durch ein schwach koordinierendes Kation (Angew. Das Hydroxid-Trihydrat-Anion Im Bild wird das sterisch anspruchsvolle Phosphazenium-Kation als die Burgmauer zur Stabilisierung dieses seltenen Anions dargestellt, das sich wie eine empfindliche wässrige "Hydroxid-Seifenblase" leicht im Vakuum zersetzt. [Extracted from the article]

Invited for the cover of this issue is the group of Berthold Hoge from Universität Bielefeld, Germany. The cover image shows a Gallic village besieged by Roman legions, which is protected by the weakly coordinating anion [Ga(C2F5)4]– obtained from a magic potion. [ABSTRACT FROM AUTHOR]

The acidic tris(pentafluoroethyl)stannane sweetens the chemistry of tin. The reaction with the reversed polar tri‐n‐butyltin hydride afforded the highly polarized unsymmetrical distannane. In the reaction with bases, the three electron‐withdrawing pentafluoroethyl substituents stabilize the readily transferable tris(pentafluoroethyl)stannate(II) anion, a compound which should not be missed in the cocktail of basic organotin chemistry. More information can be found in the Full Paper by B. Hoge et al. on page 14476. [ABSTRACT FROM AUTHOR]

The reaction of the industrial product (C2F5)3PF2 with LiAlH4 in THF solution selectively furnished the hydridophosphate anion [P(C2F5)3F2H]-. The compound [PPh4][P(C2F5)3F2H] is obtained as a colorless solid on a multigram scale by salt metathesis in aqueous THF. Combining [P(C2F5)3F2H]- with various imidazolium and pyridinium cations affords ionic liquids with melting points well below room temperature. (C2F5)3PF2 also abstracts hydrides from amines, affording the hydridophosphate anion [P(C2F5)3F2H]- and the corresponding imminium cations which add a second amine moiety by intra- or intermolecular adduct formation. [ABSTRACT FROM AUTHOR]

Weakly coordinating anions (WCAs) are of great academic as well as industrial interest. To advance the fluoroalkyl phosphate anion [P(C2F5)3F3]-, which is ideally suited for technical applications, functional substituents X are attached to the Lewis acid (C2F5)3PF2. In keeping with this, the reaction of (C2F5)3PF2 with 4-(dimethylamino)pyridine (DMAP) yields the corresponding adduct [P(C2F5)3F2(dmap)]. Treatment of this adduct with Brønsted acids (HX) leads to the selective formation of the corresponding phosphate anions [P(C2F5)3F2X]- by trapping the proton with the liberated base DMAP. In this way, OH functions can be transformed in one step into WCAs, slightly increasing the coordination properties of the corresponding anion. An ion exchange to the corresponding [PPh4] salts results in solids, whereas the corresponding imidazolium salts are obtained as room-temperature ionic liquids. [ABSTRACT FROM AUTHOR]

Compounds exhibiting main group elements in low oxidation states were found to mimic the reactivity of transition metal complexes. Like the latter, such main group species show a proclivity of changing their oxidation state as well as their coordination number by +2, therefore fulfilling the requirements for oxidative additions. Prominent examples of such main group compounds that undergo oxidative additions with organohalides R−X (R=alkyl, aryl, X=F, Cl, Br, I) are carbenes and their higher congeners. Aluminyl anions, which like carbenes and silylenes oxidatively add to strong σ‐bonds in R−X species, have been recently discovered. We present the first anion based upon a Group 14 element, namely the tris(pentafluoroethyl)silanide anion, [Si(C2F5)3]−, which is capable of oxidative additions towards C−F bonds. This enables the isolation of non‐chelated tetraorganofluorosilicate salts, which to the best of our knowledge had only been observed as reactive intermediates before. [ABSTRACT FROM AUTHOR]

Verbindungen von Hauptgruppenelementen in niedrigen Oxidationsstufen sind in der Lage, die Reaktivität von Übergangsmetallkomplexen nachzuahmen. Wie Letztere neigen niedervalente Hauptgruppenelementverbindungen zur Änderung ihrer Oxidationsstufe und Koordinationszahl um +2, wodurch sie die wesentlichen Voraussetzungen für oxidative Additionen erfüllen. Prominente Beispiele für Hauptgruppenelementverbindungen, die mit Organohalogeniden R−X (R=Alkyl, Aryl, X=F, Cl, Br, I) oxidative Additionen eingehen, sind Carbene und ihre höheren Analoga. Kürzlich wurde auch über Aluminyl‐Anionen berichtet, die wie Carbene und Silylene starke σ‐Bindungen von R−X‐Spezies oxidativ addieren können. Hier stellen wir nun mit dem Tris(pentafluorethyl)silanid‐Anion, [Si(C2F5)3]−, das erste Anion aus der 14. Gruppe vor, welches C−F‐Bindungen im Sinne einer oxidativen Addition zu spalten vermag. Dies ermöglichte die Isolierung von nicht‐chelatierten Tetraorganofluorosilicat‐Salzen, die unseres Wissens bisher nur als reaktive Zwischenstufen nachgewiesen wurden. [ABSTRACT FROM AUTHOR]

While alkyl‐substituted siloxanes are widely known, virtually nothing is known about perfluoroalkyl siloxanes and their congener species, the silanols and silanolates. We recently reported on the tris(pentafluoroethyl)silanide ion, [Si(C2F5)3]−, which features Lewis amphoteric character deriving from the pentafluoroethyl substituents and their strong electron‐withdrawing properties. Transferring this knowledge, we investigated the Lewis amphoteric behavior of the tris(pentafluoroethyl)silanolate, [Si(C2F5)3O]−. In order to examine such Lewis amphoteric behavior, we first developed a strategy for the synthesis of the corresponding silanol Si(C2F5)3OH, which readily condenses at room temperature to the hexakis(pentafluoroethyl)disiloxane, (C2F5)3SiOSi(C2F5)3. Deprotonation of Si(C2F5)3OH employing a sterically demanding phosphazene base allows the characterization of the first example of a dimeric triorganosilanolate: the dianionic hexakis(pentafluoroethyl)disilanolate, [{Si(C2F5)3O}2]2−, implies Lewis amphoteric character of the monomeric [Si(C2F5)3O]− anion. [ABSTRACT FROM AUTHOR]

Bei Betrachtung der geometrischen und elektronischen Struktur des Tris(pentafluorethyl)silanids erscheint das Anion auf den ersten Blick als Lewis‐Base. Quantenmechanischen Rechnungen zufolge liegen die HOMO‐ und LUMO‐Energien von Perfluoralkylsilaniden deutlich niedriger als die nicht fluorierter Derivate. Dies hat eine geringere Lewis‐Basizität und zugleich eine erhöhte Lewis‐Acidität des [Si(C2F5)3]−‐Ions zur Folge. Mit diesen Erkenntnissen und einer der N‐heterocyclischen Silylenen (NHSis) ähnlichen HOMO‐LUMO‐Lücke von 4.80 eV sind Perfluoralkylsilanide dazu prädestiniert, Lewis‐amphoteres Verhalten ähnlich dem der Silylene aufzuweisen. Die Deprotonierung von Si(C2F5)3H mit sterisch anspruchsvollen Phosphazenbasen liefert thermisch stabile Phosphazenium‐Salze des [Si(C2F5)3]−‐Anions, welche in unterschiedlicher Weise an Benzaldehyd, Benzophenon, CS2 und CO2 addieren. Dieses Verhalten spiegelt die Reaktivität von Silylenen gegenüber Ketonen sowie Heterocumulenen wider und wird durch die Lewis‐Amphoterie des Silanids begründet. [ABSTRACT FROM AUTHOR]

In this contribution the syntheses of transition metal complexes of the electron‐withdrawing Sn(C2F5)3 ligand are presented. The reaction of HSn(C2F5)3 with organometallics LnM–R (M = Zn, W, Mo; R = Et, Me; L = CO, Cp), metal carbonyls [Ni(CO)4], and [{Fe(CO)2Cp}2], as well as chloro complexes such as [TiCl2Cp2], furnished the corresponding stannylated compounds. The electron‐deficient Sn(C2F5)3 ligand significantly influences the IR spectroscopic and structural features with respect to related non‐fluorinated stannyl complexes. [ABSTRACT FROM AUTHOR]

Fluorine, Oxidative Addition, Perfluorosilicates, Silanide Anion, Silicon Frontispiece: Oxidative Additions of C-F Bonds to the Silanide Anion [Si(C2F5)3]- Keywords: Fluorine; Oxidative Addition; Perfluorosilicates; Silanide Anion; Silicon EN Fluorine Oxidative Addition Perfluorosilicates Silanide Anion Silicon 1 1 1 04/14/22 20220419 NES 220419 B Silicon b In their Research Article (e202116468), Berthold Hoge et al. report oxidative additions of [Si(C SB 2 sb F SB 5 sb ) SB 3 sb ] SP - sp to aryl- and alkenylfluorides, enabling the isolation of tetraorganofluorosilicate salts devoid of chelating ligands. [Extracted from the article]