Preparation, characterization and structure determination of CpFe(CO)(EPh3)SeCO-het complexes

The mixed CO/ER3 heterocyclic selenocarboxylato iron complexes CpFe(CO)(ER3)SeCO-het [het = 2-C4H3S (1), 2-C4H3O (2), -CH2-2-C4H3S (3), E = P, R = Ph (a), OC2H5(b); E = As (c), Sb (d), R = Ph)] are synthesized by the reactions of CpFe(CO)2SeCO-het with ER3 under photolytic conditions. The new complexes have been characterized by spectroscopic analysis (UV-Vis, IR, 1H-, 31P-NMR) and elemental analysis. The structures of CpFe(CO)(EPh3)SeCO-2-C4H3S (E= P, As, Sb) have been determined by X-ray crystal structure analysis.