Photochemical and thermal synthesis of metal carbonyl complexes of tetraalkyl diphosphine disulfides [M(CO) 4(R 2P(S)P(S)R 2)] (M  Mo, W; R  Me, Et, Pr-n, Bu-n)

Abstract

The new complexes [M(CO) 4(R 2P(S)P(S)R 2)], 1A-1D, 2A-2D, ( 1A, M  Mo, R  Me; 1B, M  Mo, R  Et; 1C, M  Mo, R  Pr-n; 1D, M  Mo, R  Bu-n; 2A, M  W, R  Me; 2B; M  W, R  Et; 2C, M  W, R  Pr-n; 2D, M  W, R  Bu-n) have been prepared either by the photochemical reaction of M(CO) 6 with R 2P(S)P(S)R 2, or by thermal displacement of coordinated norbornadiene in C 7H 8Mo(CO) 4 with R 2P(S)P(S)R 2, to give the complexes [M(CO) 4(R 2P(S)P(S)R 2)]. The complexes have been characterized by elemental analysis, IR and 31P-[ 1H]-NMR spectroscopy and FAB-Mass spectrometry; the spectroscopic studies suggest a cis-chelate dibentate coordination of the ligand.