LIGAND HYPERFINE INTERACTIONS IN OXOMOLYBDENUM(V) AND OXOCHROMIUM(V) HALIDE COMPLEXES

Ligand superhyperfine interactions have been observed in esr spectra of solutions, frozen glasses, and diamagnetically diluted single crystals of MoOBr52-, MoOI52-, and CrOCL52-. The results indicate considerable covalency in metal-ligand bonding. In the molybdenum and chromium complexes the superhyperfine tensors indicate π bonding involving the metal dxy orbital and p orbitals of the four equatorial ligands. In these d1- complexes the ligand orbital involved in bonding possesses some s character. © 1969, American Chemical Society. All rights reserved.