681-99-2Relevant articles and documents
Organosilicon and organotin derivatives of urea in transmetallation reactions
Gordetsov,Kulagina,Zimina
, p. 409 - 412 (2007/10/03)
Reaction of N-trimethylsilyl-N′-phenylurea with bis(tributylstannyl) oxide in refluxing THF yields tributylstannyl isocyanate and aniline as the main products, while in the case of triphenylstannyl chloride N-triphenylstannyl-N′-phenylurea can be prepared. Its thermal decomposition yields triphenylstannyl isocyanate and aniline. Reaction of N,N′-bis(trimethylstannyl)urea with (Bu3Sn)2O gives Bu3Sn-N=C=O, HMDS, and ammonia.
Synthesis and properties of isocyanate and isothiocyanate d1- and d2-complexes of vanadocene
Razuvaev, G. A.,Gordetsov, A. S.,Latyaeva, V. N.,Zimina, S. V.,Skobeleva, S. E.,et al.
, p. 327 - 336 (2007/10/02)
The reactions of vanadocene and its halides Cp2VCl and Cp2VCl2 with R3MNCX (M = Sn, Si, X = O, S) and R2M(NCX)2 in various molar ratios have been studied.The reactions proceed either by an exchange of groups, with no change in the oxidation state of vanadium, or by an oxidative addition of pseudohalide ligand: VII -> VIII; VIII -> VIV.Oxidative addition results in the formation of (R3M)2 or gaseous hydrogen (in the reaction with HCl) in the reaction products.We have prepared the first ever monomeric and readily oxidisable d2-complexes of VIII of Cp2VNCX-type and asymmetric d1-complexes of Cp2V(Cl)NCX type, which, although rather stable in air, undergo disproportionation into symmetric d1-complexes on heating.In transmetallation reactions the ligand activity is found to increase in the order Cl A general scheme for the disproportionation reaction of asymmetric complexes of vanadocene is supported by differential thermal analysis data.
