Phosphorus-nitrogen donor ligand complexes of chromium, molybdenum and tungsten carbonyls

Abstract

Metal carbonyl complexes of the general formula M(CO) 4(PN) containing a phosphorus-nitrogen donor bidentate ligand were prepared and characterized by their proton nmr and infrared spectra. The metals, M, were Cr, Mo, or W, and the ligands contained either (1) alkylamine donor groups as in (C 6H 5) 2PCH 2CH 2N(CH 3) 2, (C 6H 5) 2PCH 2CH 2N(C 2H 5) 2 and (C 6H 5) 2PCH 2CH 2CH 2N(CH 3) 2 or (2)pyridine donor groups as in (C 6H 5) 2PCH 2C 5H 4N, (C 6H 5) 2PCH 2CH 2C 5H 4N, (C 6H 5) 2PCH 2CH 2CH 2C 5H 4N and (C 6H 5) 2PN(H)C 5H 4N.