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Your search keyword '"Tungsten -- Physiological aspects"' showing total 13 results
Start Over Descriptor "Tungsten -- Physiological aspects" Topic oxygen -- physiological aspects
13 results on '"Tungsten -- Physiological aspects"'

1. Di- and tricobalt Dawson sandwich complexes: synthesis, spectroscopic characterization, and electrochemical behavior of Na (sub)18 [(NaOH (sub)2) (sub)2 Co (sub)2 (P (sub)2 W (sub)15 O (sub)56) (sub)2] and Na (sub)17 [(NaOH (sub)2) Co (sub)3 (H (sub)2 O)(P (sub)2 W (sub)15 O (sub)56) (sub)2]

Author

Ruhlmann, Laurent, Canny, Jacqueline, Contant, Roland, and Thouvenot, Rene

Subjects
Chemistry, Inorganic -- Research, Coordination compounds -- Physiological aspects, Electrochemistry -- Research, Sodium -- Physiological aspects, Oxygen -- Physiological aspects, Cobalt -- Physiological aspects, Hydrogen -- Physiological aspects, Chemical reactions -- Analysis, Phosphorus -- Physiological aspects, Tungsten -- Physiological aspects, Nuclear magnetic resonance spectroscopy -- Usage, Chemistry
Abstract

Research has been conducted on the di- and tricobalt Dawson sandwich complexes. The synthesis of these complexes has been carried out by the reaction condition modification and the characterization of the complexes has been carried via (super)31 P NMR spectroscopy, elemental analysis and IR.

Published
2002

2. The lacunary polyoxoanion synthon alpha-P (sub)2 W (sub)15 O (sub)56 (super)12- : an investigation of the key variables in its synthesis plus multiple control reactions leading to a reliable synthesis

Author

Hornstein, Brooks J. and Finke, Richard G.

Subjects
Chemistry, Inorganic -- Research, Polymers -- Physiological aspects, Anions -- Physiological aspects, Phosphorus -- Physiological aspects, Tungsten -- Physiological aspects, Oxygen -- Physiological aspects, Chemical reactions -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the lacunary polyoxoanion alpha-P (sub)2 W (sub)15 O (sub)56 (super)12-. The purity of this compound has been determined via the conversion of alpha-P (sub)2 W (sub)15 O (sub)56 (super)12- into tri-Nb (super)5+ - and V (super)5+ -containing polyoxoanion and the details are reported.

Published
2002

3. A DFT study of the electronic spectrum of the alpha-Keggin anion [Co (super)II W (sub)12 O (sub)40] (super)6-

Author

Maestre, Joan Miquel, Lopez, Xavier, Bo, Carles, Poblet, Joseph-M., and Daul, Claude

Subjects
Chemistry, Inorganic -- Research, Density functionals -- Usage, Anions -- Physiological aspects, Oxygen -- Physiological aspects, Cobalt -- Physiological aspects, Tungsten -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the [Co (super)II W (sub)12 O (sub)40] (super)6- excited configurations. The calculations of the configurations' multiple splittings carried out via the use of the density functional theory are presented.

Published
2002

4. An EXAFS study of the influence of fluorine on the structure of sulfided W/Al (sub)2 O (sub)3 and NiW/Al (sub)2 O (sub)3 catalysts

Author

Schwartz, Viviane, Sun, Mingyong, and Prins, Roel

Subjects
Chemistry, Physical and theoretical -- Research, Fluorine -- Physiological aspects, Sulfides -- Physiological aspects, Tungsten -- Physiological aspects, Aluminum -- Physiological aspects, Oxygen -- Physiological aspects, Catalysts -- Physiological aspects, Chemicals, plastics and rubber industries
Published
2002

5. Syntheses, crystal structures, and density functional theory calculations of the closo-[1-M(CO) (sub)3 (nu (super)4 -E (sub)9)] (super)4- (E= Sn, Pb; M= Mo, W) cluster anions and solution NMR spectroscopic characterization of [1-M(CO) (sub)3 (nu (super)4 -Sn (sub)9)] (super)4- (M= Cr, Mo, W)

Author

Campbell, Janette, Mercier, Helene P. A., Franke, Holger, Santry, David P., Dixon, David A., and Schrobilgen, Gary J.

Subjects
Chemistry, Inorganic -- Research, Density functionals -- Analysis, Anions -- Physiological aspects, Coordination compounds -- Physiological aspects, Molybdenum -- Physiological aspects, Lead -- Physiological aspects, Tungsten -- Physiological aspects, Tin -- Physiological aspects, Oxygen -- Physiological aspects, Hydrogen -- Physiological aspects, Chromium -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the heteroatomic closo-[1-M(CO) (sub)3 (nu (super)4 -E (sub)9)] (super)4- (E= Sn, Pb; M= Mo, W) anions. The crystal structures of these anions and solution characterization of the [1-M(CO) (sub)3 (nu (super)4 -Sn (sub)9)] (super)4- (M= Cr, Mo, W) anions have been investigated and the results of the NMR spectroscopy analysis of the anions are presented.

Published
2002

6. Preparation, structure, and properties of the corner-shared double cubes [Mo (sub)6 HgQ (sub)8 (H (sub)2 O) (sub)18] (super)8+ (Q= S, Se) and tungsten analogues

Author

Fedin, Vladimir P., Sokolov, Maxim, Lamprecht, Gert J., Hernandez-Molina, Rita, Seo, Mi-Sook, Virovets, Alexander V., Clegg, William, and Sykes, A. Geoffrey

Subjects
Chemistry, Inorganic -- Research, Molybdenum -- Physiological aspects, Mercury -- Physiological aspects, Hydrogen -- Physiological aspects, Oxygen -- Physiological aspects, Sulfur -- Physiological aspects, Selenium -- Physiological aspects, Coordination compounds -- Physiological aspects, Tungsten -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the mercury-containing purple corner-shared [Mo (sub)6 HgS (sub)8 (H (sub)2 O) (sub)18] (super)8+ double cube derivative of green [Mo (sub)3 S (sub)4 (H (sub)2 O) (sub)9] (super)4+. The preparation of this derivative under the air-free conditions via the reaction with Hg (super)0 and with Hg (super)I (sub)2 is described.

Published
2001

7. Asymmetric sandwich-type polyoxoanions. Synthesis, characterization, and X-ray crystal structures of diferric complexes [TM (super)II Fe (super)III (sub)2 (P (sub)2 W (sub)15 O (sub)56)(P (sub)2 TM (super)II (sub)2 W (sub)13 O (sub)52)] (super)16-, TM= Cu or Co

Author

Anderson, Travis M., Hardcastle, Kenneth I., Okun, Nelya, and Hill, Craig L.

Subjects
Chemistry, Inorganic -- Research, Anions -- Physiological aspects, Iron compounds -- Physiological aspects, Phosphorus -- Physiological aspects, Oxygen -- Physiological aspects, Tungsten -- Physiological aspects, Copper -- Physiological aspects, Cobalt -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the diferric sandwich-type polyoxometalate. The reaction of this compound with the excess aqueous Cu(II) and Co(II) which produces a d-electron-metal substituted polyoxometalate is described.

Published
2001

8. Preparation, structure, and reactivity of Ge-containing heterometallic cube derivatives of [M (sub)3 E (sub)4 (H (sub)2 O) (sub)9] (super)4+ (M=Mo, W; E=S, Se)

Author

Mi-Sook Seo, Fedin, Vladimir P., Sokolov, Maxim N., Hernandez-Molina, Rita, Sokolowski, Achim, Elsegood, Mark R. J., Clegg, William, and Sykes, A. Geoffrey

Subjects
Chemistry, Inorganic -- Research, Germanium -- Physiological aspects, Hydrogen -- Physiological aspects, Oxygen -- Physiological aspects, Molybdenum -- Physiological aspects, Selenium -- Physiological aspects, Sulfur -- Physiological aspects, Tungsten -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the Group 14 germanium. The incorporation of this Group into the incomplete cuboidal clusters [M (sub)3 E (sub)4 (H (sub)2 O) (sub)9] (super)4+ (M=Mo, W; E=S, Se) has been investigated and the results are reported.

Published
2001

9. Preparation and substitution chemistry of [Bu (sub)4 N] (sub)2 [W (sub)6 Cl (sub)8 (p-OSO (sub)2 C (sub)6 H (sub)4 CH (sub)3) (sub)6]. A useful precursor for pseudohalide, acetate, and organometallic complexes containing the {W (sub)6 Cl (sub)8} (super)4+ core

Author

Weinert, Charles S., Prokopuk, Nicholas, Arendt, Stephanie M., Stern, Charlotte L., and Shriver, Duward F.

Subjects
Chemistry, Inorganic -- Research, Chlorine -- Physiological aspects, Tungsten -- Physiological aspects, Hydrogen -- Physiological aspects, Oxygen -- Physiological aspects, Sulfur -- Physiological aspects, Coordination compounds -- Physiological aspects, Acetates -- Physiological aspects, Halides -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the tosylate cluster. The preparation and characterization of the cluster have been performed via the use of IR and NMR spectroscopy, elemental analysis and X-ray crystal structure study and the results indicate that this cluster is a useful material for the pseudohalide cluster preparation.

Published
2001

10. Synthesis and characterization of copper-, zinc-, manganese-, and cobalt-substituted dimeric heteropolyanions, [(alpha-XW (sub)9 O (sub)33) (sub)2 M (sub)3 (H (sub)2 O) (sub)3] (super)n- (n= 12, X= As (super)III, Sb (super)III, M= Cu (super)2+, Zn (super)2+; n= 10, X= Se (super)IV, Te (super)IV, M= Cu (super)2+) and [(alpha-AsW (sub)9 O (sub)33) (sub)2 WO(H (sub)2 O) M (sub)2 (H (sub)2 O) (sub)2] (super)10- (M= Zn (super)2+, Mn (super)2+, Co (super)2+)

Author

Kortz, Ulrich, Al-Kassem, Noha K., Savelieff, Masha G., Kadi, Nisrine A. Al, and Sadakane, Masahiro

Subjects
Chemistry, Inorganic -- Research, Copper -- Physiological aspects, Zinc -- Physiological aspects, Manganese -- Physiological aspects, Cobalt -- Physiological aspects, Anions -- Physiological aspects, Tungsten -- Physiological aspects, Oxygen -- Physiological aspects, Hydrogen -- Physiological aspects, Arsenic -- Physiological aspects, Selenium -- Physiological aspects, Tellurium -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the metal-oxygen cluster species, polyoxometalates. The structure and properties of these polyoxometalates have been investigated and the results are reported.

Published
2001

11. Edge-bridged octahedral tungsten-oxygen-chlorine clusters: synthesis and characterization of two D (sub)3d -symmetric [W (sub)6 O (sub)6 Cl (sub)12] (super)2- isomers and [W (sub)6 O (sub)7 Cl (sub)11] (super)3-

Author

Crawford, Nathan R. M. and Long, Jeffrey R.

Subjects
Chemistry, Inorganic -- Research, Tungsten -- Physiological aspects, Oxygen -- Physiological aspects, Chlorine -- Physiological aspects, Bismuth -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the tungsten-oxygen-chlorine clusters. The results of the reaction in which the entrance to the tungsten oxochloride cluster chemistry is provided via WOCl (sub)4 reduced with bismuth metal are reported.

Published
2001

12. Functionalization of [MoW (sub)5 O (sub)19] (super)2- with aromatic amines: synthesis of the first arylimido derivatives of mixed-metal polyoxometals

Author

Wei, Yongge, Lu, Meng, Cheung, Calida Fung-chi, Barnes, Charles L., and Peng, Zhonghua

Subjects
Chemistry, Inorganic -- Research, Amines -- Physiological aspects, Aromatic compounds -- Physiological aspects, Metals -- Physiological aspects, Oxygen -- Physiological aspects, Tungsten -- Physiological aspects, Molybdenum -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the functionalization of hexamolybdates with aromatic amines under mild conditions. Results indicate that this reaction can be extended to the [MoW (sub)5 O (sub)19] (super)2- mixed-metal cluster and can allow the synthesis of the arylimido derivatives of this cluster.

Published
2001

13. The ordered [WO (sub)2 F (sub)4] (super)2- anion

Author

Welk, Margaret E., Norquist, Alexander J., Stern, Charlotte L., and Poeppelmeier, Kenneth R.

Subjects
Chemistry, Inorganic -- Research, Anions -- Physiological aspects, Tungsten -- Physiological aspects, Oxygen -- Physiological aspects, Fluorine -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the [WO (sub)2 F (sub)4] (super)2- anion. The coordination to the charged sites on this anion in the new compound using the additional hydrogen bond from the hydroxyl group distinguishes the oxide and fluoride ligands and the results indicate that the new compound provides the insight into the oxide fluoride anion group and the origins of their solid-state structures.

Published
2001

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