Structure and synthesis of isomers of novel binuclear cobalt(III)-phenyl phosphate complexes

Article abstract of DOI:10.1021/ic00142a010

The reaction between cis-[Co(en)₂Cl₂]ClO₄ and silver phenyl phosphate in anhydrous dimethyl sulfoxide yielded the dimeric cation {[Co(en)₂(μ-O₃POC₆H₅)] ₂}²⁺ as the major product. An X-ray structure determination of the meso diastereomer as the triflate salt monohydrate showed that it consisted of two bis(ethylenediamine)cobalt(III) moieties bridged by two phosphate ester groups; the two cobalt atoms and two bridging ligands define an eight-membered ring. Crystals were of space group P2₁/c with a = 9.454 (5) A?, b = 28.683 (14) A?, c = 7.487 (4) A?, β = 97.21 (8)°, and Z = 4, R being 0.060 for 1675 reflections with I > 2.5σ(I). The racemic diastereomer has been resolved, and the corresponding rotatory dispersion and circular dichroism spectra are discussed.