Synthesis and Molecular Structure of cis-Tetracarbonyl[N-(diphenylphosphino-kP)-naphthalen-1-yl-P,P-diphenylphosphinous amide-kP]chromium(0)

The reaction of N , N -bis(diphenylphosphanyl)naphthylamine C 10 H 7 -1-N(PPh 2 ) 2 with (C 5 H 10 NH) 2 Cr(CO) 4 (1 : 1 molar ratio) in dichloromethane afforded cis -[Cr(CO) 4 {C 10 H 7 -1-N(PPh 2 ) 2 }] (1) . This complex was crystallized in the monoclinic space group P 2 1 /n. The structure was solved by direct methods and refined by full-matrix least squares techniques to an R factor of 0.0313 for 6488 observed reflections. The Cr-metal is coordinated by four terminal CO molecules and a P , P ′-bidentate N , N -bis(diphenylphosphanyl)naphthylamine ligand in a distorted octahedral array. The N-atom adopts a planar geometry with the two P-atoms and C-atom attached to it. The four-membered metallacycle ring P 2 CrN is nearly planar.