134695-26-4Relevant articles and documents
Selective Substitution of an Imido Ligand in Alkyl- and Arylimido Rhenium(VII) Complexes; Crystal Structured of (2,6-Dimethylphenyl)ammonium Trichlorobis(2,6-dimethylphenylimido)methylrhenate(VII) and Bis(2,6-dimethylphenylimido)methylbis(neopentyl)rhenium(VII)
Cook, Malcolm R.,Herrmann, Wolfgang A.,Kiprof, Paul,Takacs, Janos
, p. 797 - 804 (1991)
Reaction of ReMeO3 and 2,6-dimethylphenyl isocyanate gives the imido complex (R=2,6-Me2C6H3.Complexes of the type or t)3> undergo selective substitution of only one imido ligand to form bis(imido) derivatives.Thus, t)3> reacts with the weak acid catechol via protonation of one imido ligand to form a stable five-co-ordinate complex t)2(O2C6H4)>.In contrast, forms a complex which can only be isolated in a pur state by the addition of pyridine (py) to give the six-co-ordinate .The complex also reacts with thiophenol to give five-co-ordinate .Reaction of with HCl gives the ionic complex .The crystal structure of this complex was determined by X-ray crystallography.The neutrak dihalide complexes (X=Cl or Br) are prepared from by the addition of 2 equivalents of pyridinium halide.Alkylation of the dichloro or dibromo derivative with neopentylmagnesium chloride gives the novel mixed-alkyl complex t)2(NR)2> as a mixture of two isomers, the structure of one of which was determined by X-ray crystallography.
