| Abstract: | The binuclear nitrosylhalides of iron and cobalt react with cyanide to anionic complexes M(NO)2(CN)2]? (M = Fe, Co). Substituted monomeric compounds M(NO)2LBr and Ni(NO)L2Br lead primarily under replacement of bromide to nonionic complexes M(NO)2LCN and Ni(NO)L2CN. In general these complexes react with more cyanide yielding anions M(NO)2(CN)2]?, Ni(NO)L(CN)2]? and Ni(NO)(CN)3]2?. The paramagnetic dinitrosyliron compounds can be reduced to diamagnetic complexes by Na/Hg. A disproportion reaction of Co(NO)2P(C6H5)3CN forms a salt Co(NO)2 · (P(C6H5)3)2]Co(NO)2(CN)2], a similar salt can be made by the reaction of NaCo(NO)2(CN)2] with Co(NO)2(NHP(C6H5)32]Br. The IR spectra are discussed. |
