Synthesis of some manganese and rhenium trifluoroacetoxymethyl and iodomethyl complexes. X-ray structures of cis-Re(CO)4(PPh3)CH2OC(O)CF3, fac-Re(CO)3(dppp)CH2OC(O)CF3 and cis-Re(CO)4(PPh3)CH2I

The manganese and rhenium trifluoroacetoxymethyl complexes, cis-Re(CO)4(PPh3)CH2OC(O)CF3 (1), fac-Mn(CO)3(dppe)CH2OC(O)CF3 (2), fac-Mn(CO)3(dppp)CH2OC(O)CF3 (3), fac-Re(CO)3(dppe)CH2OC(O)CF3 (4), fac-Re(CO)3(dppp)CH2OC(O)CF3 (5) and the manganese iodomethyl complex fac-Mn(CO)3(dppp)CH2I (6), have been prepared by treating the corresponding methoxymethyl complexes with CF3COOH and (CH3)3SiI, respectively. Structural characterizations of 1, 5 and cis-Re(CO)4(PPh3)CH2I (7) show rhenium–carbon (ReCH2) bond lengths of 2.267(8), 2.242(3) and 2.38(8) Å, respectively. The ReCCH2I bond angle of 118.8(3)° in 7 indicates that the methylene carbon is severely distorted from tetrahedral geometry.