ISSN:
1434-1948
Keywords:
Tungsten
;
Carbonyl complexes
;
Undecamethylcyclohexasilyl
;
Transition metal silicon compounds
;
Anions
;
Tungsten silicide
;
Silicon
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The complexes [Li(DIME)2][W(CO)5L] [L = OCN 2, NCS 3a, PPh24, SiMe2Ph 8, N(SiMe3)29, CH2Ph 10, Si6Me1111; DIME = diethylene glycol dimethyl ether] have been prepared by reaction of [Li(DIME)2][W(CO)5I] (1) with KOCN, KSCN, NaPPh2, LiSiMe2Ph, LiN(SiMe3)2, PhCH2MgCl, and KSi6Me11, respectively. Photochemical ligand substitution in W(CO)6 has been used as an alternative method for the preparation of pentacarbonyl tungstates; [K(DIME)2][W(CO)5NCS] (3b), [Na(DIME)2][W(CO)5N3] (5), [Li(DIME)2][W2(CO)10(μ-H)] (6), and [K(DIME)2][W2(CO)10(μ-CN)] (7) were synthesized in this manner. The molecular structure of [Li(DIME)2][W(CO)5Si6Me11] (11) has been determined by X-ray diffraction analysis. The spectral and chemical properties of 2-11 are discussed. Pyrolysis of 11leads to tungsten silicide and tungsten carbide.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
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