On the empirical bond length, bond strength and vibration frequency correlations applied to μ 2-sulfato and μ 2-phosphatodicobalt(III) complexes

Abstract

Changes of S-O and P-O bond lengths and strengths in SO 4 and PO 4 ions, due to bonding between atoms of metal, hydrogen and carbon are discussed. The empirical correlations between the bond length, bond strength and vibrational frequency are used to predict the phosphorus-oxygen distances in the PO 4 3− group bridging two cobalt atoms. The following mean P-O distances were accepted: bridging P-O b = 1.553 Å and terminal P-O t = 1.522 Å. The crystal data for [(NH 3) 4Coμ(NH 2PO 4)Co(NH 3) 4]Br 2 · 5H 2O complex are given.