Reactions of coordinated ligands VII. Reactions of (CO)5MoPPh2Cl and cis-(CO)4Mo(PPh2Cl)2 with selected diamines and amino alcohols. Synthesis of cis-(CO)4M(PPh2OCH2CH2NMe2) (M = Cr, Mo, W)☆

Abstract N , N -Dimethylethanolamine reacts with (CO) 5 Mo(PPh 2 Cl) to give (CO) 5 Mo(PPh 2 OCH 2 CH 2 NMe 2 ) which has been characterized as a BF 3 adduct and by heating to form the mixed donor (P,N) chelate complex (CO) 4 Mo(PPh 2 OCH 2 CH 2 NMe 2 ). The chromium and tungsten analogs of the Mo chelate complex have been made by photochemical reaction between the hexa carbonyls and the uncomplexed (P,N) ligand. A combination of chloride displacemetn and photochemical chelation were used to obtain cis -(CO) 4 Mo(PPh 2 NHCH 2 CH 2 NMe 2 ). With cis -(CO) 4 Mo(PPh 2 Cl) 2 , HOCH 2 CH 2 NME 2 gives cis -(CO) 4 Mo(PPh 2 OCH 2 CH 2 NMe 2 )(PPh 2 OH) and not the expected disubstituted product. Ethylenediamine, N -methylethylenediamine and N , N -dimethylethylenediamine react with cis -(CO) 4 Mo(PPh 2 Cl) 2 in a straight forward manner to yield cis -(CO) 4 Mo(PPh 2 NHCH 2 CH 2 NR 2 ) 2 where R 2 = H 2 , HMe, and Me 2 , respectively. N , N ′-Dimethylethylenediamine yields only the chelate complex (CO) 4 Mo(PPh 2 NMeCH 2 CH 2 NMePPh 2 ). The 1 H NMR spectra of these complexes reveal some interesting examples of PH and HH virtual coupling.