Abstract

Deviations from planarity of the 17 non-hydrogen atoms forming the equatorial moiety in cobaloximes can be described by six significant distortion modes. No significant correlation has been found between these deformations and changes in the axial CoC and CoN distances. Analysis of the CoR and CoB distances reveals that, in a series of related RCo(DH) 2B complexes, the two distances lengthen or shorten simultaneously but to different degrees. This anomalous structural trans-influence is quantified with the help of an additive scheme based on the nature of the axial ligands R and B, and is discussed in terms of a simple Hückel molecular-orbital model.

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