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• W2085552116 abstract "The interaction of MeI with the complexes [Nb(η5-C5H4SiMe3)XCS2-C,S] (X = Cl 1, X = Br 2) affords the cationic complexes containing a methyldithiocarboxylate group, [Nb(η5-C5H4SiMe3)2XC(S)SMe-C,S)]I (X = Cl 3, X = Br 4) as the result of the electrophilic attack of MeI in the sulfur (exo) atom of the coordinated CS2. In contrast, the trihydride [Nb(η5-C5H4SiMe3)2H3] 5 interact under mild conditions in THF, with phosphites giving rise to new hydrideniobium(III) complexes, [Nb(η5-C5H4SiMe3) 2HL] (L = P(OMe)3 6, P(OEt)3, 7, P(OPh)3 8). Complexes Nb(η5-C5H4 SiMe3)2HL undergo an insertion of CS2 into the niobium-hydrogen bond to give products, the nature of which are highly dependent on L. With L = CO [Nb(η5-C5H4SiMe3)2S(S)CHS)(CO)] 10 is obtained, whereas [Nb(η5-C5H4SiMe3)2(SCHSSS)] 11 with an η2-dithioformate is the product of similar reactions for 6, 7 and 8. Finally, using several electrophile synthons of Group 11 metals, we have prepared two families of early-late heterobimetallic complexes. Compound 1 reacts, through the sulfur (exo) atom of the CS2, with [MPPh3]PF6 to give cationic heterobimetallic complexes [Nb(η5-C5H4SiMe3) 2Cl(μ-CS2)(C(S)SM(PPh3))][PF6] (M = CU 12, M = Ag 13, M = Au 14). In a similar way, 6-8 react with [AuPPh3][PF6] to give the species containing a hydride bridge [Nb(η5-C5H4SiMe3)2L(μ-H)(AuPPh3)][PF6] (L = P(OMe)3 15, L = P(OEt)3 16, L = P(OPh)3 17). All the complexes described have been characterized using IR and NMR techniques." @default.
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• W2085552116 date "1994-11-01" @default.
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• W2085552116 title "Studies of the reactivity towards insertion and electrophilic processes of Nb-H and Nb(η2-CS2) moieties of bis(trimethylsilylcyclopentadienyl)niobium complexes" @default.
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• W2085552116 doi "https://doi.org/10.1016/0022-328x(94)88189-8" @default.
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