623114-44-3Relevant academic research and scientific papers
Diamidophosphine complexes of niobium(III) and (IV): Imide formation via ancillary ligand decomposition
Fryzuk, Michael D.,Shaver, Michael P.,Patrick, Brian O.
, p. 293 - 298 (2008/10/08)
The diamidophosphine complexes of niobium CyPh[NPN]NbCl(DME) (2), CyPh[NPN]NbCl2 (6), and PhPh[NPN]NbCl 2 (9), where RR′[NPN]=RP(CH2SiMe 2NR′)2 have been prepared, isolated and characterized. Generation of RR′[NPN]NbCl(DME) species competes with the production of (RR′[NPN]NbCl) 2(μ-N2) and can be controlled with N2 pressure. CyPh[NPN]NbCl2 spontaneously decomposes into CyPh[NPN]NbCl(=NPh) (7), CyP(CH2SiMe2) 2NPh (8), and a paramagnetic impurity. Compound 7 was characterized by an X-ray diffraction study and its structural features are discussed. The Nb-Nimido bond length is 1.789(2) A? with a Nb-N imido-C bond angle of 167.9(2)° in a distorted square pyramidal structure. Reduction of PhPh[NPN]NbCl2 (9), with KC 8 produced PhPh[NPN]NbCl(=NPh), PhP(CH2SiMe2)2NPh, and a paramagnetic impurity.
