255718-83-3Relevant academic research and scientific papers
Mixed dinitrogen-organocyanamide complexes of molybdenum(0) and their protic conversion into hydrazide and amidoazavinylidene derivatives
Cunha, Sonia M. P. R. M.,Guedes da Silva, M. Fatima C.,Pombeiro, Armando J. L.
, p. 2157 - 2164 (2003)
Organocyanamides, N≡CNR2 (R = Me or Et), react with trans-[Mo(N2)2(dppe)2] (1, dppe = Ph2PCH2CH2PPh2), in THF, to give the first mixed molybdenum dinitrogen-cyanamide complexes trans-[Mo(N2)(NCNR2)(dppe)2] (R = Me 2a or Et 2b) which are selectively protonated at N2 by HBF4 to yield the hydrazide(2-) complexes trans-[Mo(NNH2)(NCNR2)(dppe)2] [BF4]2 (R = Me, 3a, or Et, 3b). On treatment with Ag[BF4], oxidation and metal fluorination occur, and the ligating cyanamide undergoes an unprecedented β-protonation at the unsaturated C atom to form trans-[MoF(NCHNR2)(dppe)2][BF4]2 (R = Me, 4a, or Et, 4b) compounds which present the novel amidoazavinylidene (or amidomethyleneamide) ligands. Complexes 4 are also formed from the corresponding compounds 3, with liberation of ammonia and hydrazine. The crystal structure of 2b was determined by single-crystal X-ray diffraction analysis which indicates that the N atom of the amide group has a trigonal planar geometry.
