摘要:
A range of complexes Cl(3-n)R(n)SnFe(CO)(3)(NO) (R = Ph, Me; n = 0-3) has been prepared, and the X-ray crystal structures of Ph(3)SnFe(CO)(3)(NO) (Sn-Fe 2.619 Angstrom) and ClPh(2)SnFe(CO)(3)(NO) (Sn-Fe 2.582 Angstrom) have been determined. The complex IR spectra of the species with mixed substituents on tin are discussed in terms of conformers related by rotation about the Sn-Fe bond, which gives rise to different delocalised pi-bonding interactions. Comparison with earlier work suggests the previously reported germanium complexes R(2)Ge(mu-X)Fe(CO)(2)(NO) do not exist.