Transition metal nitrosyl compounds, Part XXV Studies of some nitrosyl complexes of molybdenum and tungsten.

Autor: Johnson, Brian, Khair, Abul, Savory, Christopher, Walter, Robert, AI-Obaidi, K., AI-Hassam, T.
Zdroj: Transition Metal Chemistry; Dec1978, Vol. 3 Issue 1, p81-87, 7p
Abstrakt: On u.v. irradiation, the dinitrosyldithiocarbamato M(NO) (S2 CNR2 )2 (M = Mo or W) complexes are converted quantitatively into the mononitrosyl M(NO)(SCNR) complexes. The tungsten complex exhibits nonrigid behaviour at high temperatures; the activation energy for this process has been determined and compared to that of the molybdenum analogue. The M(NO) (MeCOCHCOMe) and M(NO) [(O)SCNR] compounds have been prepared; these undergo conversion into uncharacterized nitrosyl derivatives upon irradiation. Cationic complexes of the type [M(NO) (MeCN)]2+, [M(NO) (MeCN) X]+ and [M(NO) (MeCN) (MeCOCHCOMe)]+ have been prepared and their exchange with CDCN studied. Exchange occurs via a dissociative process and is stereospecific for [M(NO) (MeCN) ]2+ (M = Mo or W) and [M(NO) (MeCN) X]+ (M = MO, X = Cl; M = W, X = Br). [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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