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The novel organic–inorganic hybrid salt [(C5H5N)2CH2][Hg2Cl6] was synthesized, isolated as pure white powder and fully characterized by FTIR, multinuclear NMR, UV–Vis spectroscopy and powder-X-ray diffraction studies. The molecular structure displays organic dicaions [(C5H5N)2CH2]2+ and distinctive dimeric anions [Hg2Cl6]2−. Within any indivisual [Hg2Cl6]2− unit, each Hg center is souronded by four Cl atoms (two terminal and two bridging Cl ones) adopting a distorted tetrahedral geometry. The terminal Cl atoms are covalently bonded to Hg with an average bond disntance of 2.32(5) Å and Cl–Hg–Cl angle of 138.14(5)°. In contrast the two bridging Cl ligands to Hg centers have relatively longer mean bond length of 2.51(5) Å and smaller Cl–Hg–Cl bond angle of 93.68(5)°. The edge Cl–Cl are shared by the two roughly tetrahedra to form the dimeric [Hg2Cl6]2−. The relatively large mean Cl–Hg–Cl angle of the terminal Cl atoms (138.14°) and small angle of the bridging ligands (93.68°) indicate a considerable deviation from the ideal tetrahedral geometry. Noteworthy, within each [Hg2Cl6]2− unit, the Hg1...Hg2 distance [3.41(3) Å] is slightly shorter than the sum of the van der Waals radii for Hg(II) indicating a rather weak mercurophilic interaction. The novel organic-inorganic hybrid salt [(C5H5N)2CH2][Hg2Cl6] was synthesized, isolated as pure white powder and fully characterized by FTIR, multinuclear NMR, UV-vis spectroscopy and powder-X-ray diffraction studies. [ABSTRACT FROM AUTHOR]

The highly insoluble organic-inorganic hybrid ionic compounds N,N′-methylenedipyridinium tetrachloroplatinate(II) [(CHN)CH] · [PtCl] and N,N′-methylenedipyridinium hexachloroplatinate(IV) [(CHN)CH] · [PtCl] were obtained by the treatment of N,N′-methylenedipyridinium dichloride monohydrate [(CHN)CH]Cl · HO with K[PtCl] or (NH)[PtCl], respectively, in an aqueous solution. Both complexes were isolated, purified, characterised by elemental analysis, and their molecular structures were confirmed by powder X-ray diffraction. The crystal structure of both compounds consists of separated discrete dications [(CHN)CH] and anions [PtCl] ( n = 4 or 6). As anticipated, the dications formed a butterfly shape consisting of two pyridine rings bound to the methylene group via their N atoms, while the Pt centre had a square planar geometry in [(CHN)CH] · [PtCl] and an octahedral coordination in [(CHN)CH] · [PtCl]. Interestingly, both crystal structures are stabilised by intermolecular C-H...Cl non-standard hydrogen bonds, π- π ring interactions between two pyridine rings of adjacent dications, and also by Cl- π interactions. [ABSTRACT FROM AUTHOR]

Treatment of N,N′-methylenedipyridinium dichloride [CHN-CH-NCH]Cl with MCl (M = Zn or Cd) in aqueous solution gives the organic-inorganic hybrid ionic compounds [CHN-CH-NCH] · [MCl]. Both complex salts were fully characterised by multinuclear NMR spectroscopy, elemental analysis, and their molecular structures confirmed by powder X-ray diffraction studies. The most striking feature in both solid state structures was the presence of the C...Cl-M short contacts between the organic [CHN-CH-NCH] dication and inorganic [MCl] anion, which led to different crystal packing. For [CHN-CH-NCH]·[ZnCl], the C...Cl-Zn interactions led to the alternating arrangement of [CHN-CH-NCH][ZnCl] to form 1-D chains in the direction [010], and each individual chain had a two-fold rotational axis along the b axis, while for [CHN-CH-NCH] · [CdCl] the C...Cl-Cd associations gave 2-D network. In both solid state structures, the presence of Cl-ring centroid distances gave a strong indication of some form of Cl- π interactions. [ABSTRACT FROM AUTHOR]

2-Methyl-2-propoxypropyl isocyanide [CNCH2C(OPr)(CH3)2] and its Cu(I) tetrafluoroborate complex [Cu{CNCH2C(OPr)(CH3)2}4]BF4 were prepared in good yields and purities. Both compounds were fully characterized by IR and NMR spectroscopy. [ABSTRACT FROM AUTHOR]