Photochemical Reactions of Re(CO) 5 Br with Ph 2 P(S)(CH 2 ) n P(S)Ph 2 (n = 1,2,3)

The complexes fac-[Re(CO) 3 Br{Ph 2 P(S)(CH 2 ) n P(S)Ph 2 }] [1a, n = 1; 2a, n = 2; 3a, n = 3] and [Re 2 (CO) 8 Br 2 {μ- Ph 2 P(S)(CH 2 ) n P(S)Ph 2 }] [1b, n = 1; 2b, n = 2; 3b, n = 3] have been prepared by the photochemical reaction of Re(CO) 5 Br with Ph 2 P(S)(CH 2 ) n P(S)Ph 2 . The products have been characterized by elemental analysis, mass spectroscopy, FT-IR and 31 P-[ 1 H]-NMR spectrometry. The results suggest cis-chelate bidentate coordination of the ligand in fac-1a - 3a and cis-bridging bidentate coordination of the ligand between two metals in 1b - 3b.