The stereochemistry of (µ-SR)3M3 cyclic molecules, with reference to the molecular structures of (µ-SPh)3Cu3(PPh3)4 and [(µ-SPh)3Fe3Cl6]3–

Abstract

In the cyclic molecule (µ-SPh)₃Cu₃(PPh₃)₄ possessing a twist conformation different from the planar (µ-SPh)₃Fe₃ ring in [Fe₃(SPh)₃Cl₆]^3–, the CU–S–Cu angles vary from 87 to 124°, but correlate well with the inclination of the S–C bonds to their Cu–S–Cu planes, a pattern which is pertinent to the conformations of similar cycles in metallo-cysteine proteins.