General relationship between ring structural and pseudorotational parameters of five-membered rings. Application to aminocarboxylato chelates in cobalt(III) complexes

Abstract A general relationship between the ring structural and the ring pseudorotational parameters for puckered five-membered rings is derived. The relationship enables direct calculation of the pseudorotational parameters from the known ring geometry. The applicability of the derived relationship is demonstrated by classification of amino-carboxylato chelate rings in cobalt(III) complexes in terms of the pseudorotational coordinates. A strong preference of the aminocarboxylato chelate ring conformations having the CoOCC torsional angle close to zero is observed.