Synthesis of thorium (uranyl) sulfoxide complexes and crystal structure of novel thorium complex containing both 10 and 12 coordinated thorium

Two complexes [Th(NO3)3(dchso)4][Th(NO3)5(dchso)2] (1) and [UO2(NO3)2(dchso)2] (2) (dchso=dicyclohexyl sulfoxide) have been synthesized and characterized. The crystal structure of [Th(NO3)3(dchso)4][Th(NO3)5(dchso)2] (1) has been determined. The X-ray analysis reveals that 1 contains [Th(NO3)3(dchso)4]+ cations and [Th(NO3)5(dchso)2]− anions. In the cations, the Th atom has a coordination number 10 with irregular polyhedron involving six oxygen atoms from three bidentate nitrate groups and four oxygen atoms from the four dchso ligands. In the anions, the Th atoms have a coordination number 12 with icosahedron involving 10 oxygen atoms from five bidentate nitrate groups and two oxygen atoms from the two dchso ligands. [Copyright &y& Elsevier]