Bipodal acylthiourea ligands as building blocks for Bi-, tetra-, and polynuclear oxorhenium(V) complexes.

Reactions of (NBu4)[ReOCl4] and 3,3,3′, 3′-tetraalkyl-1,1′-isophthaloylbis(thioureas), H 2phth(R2 tu)2 where R = Et, i-Bu, in hot MeOH with the addition of Et3N give red products of the composition [ReO(OMe){phth(R2tu)2}]2 (8a, R = Et; 8b, R = i-Bu). X-ray structures of 8 reveal symmetric binuclear complexes containing two almost coplanar organic ligands, each of which coordinates to two rhenium centers via the two bidentate-O,S moieties. The octahedral coordination spheres of the rhenium atoms are completed by each one oxo and one methoxido ligand which are directed perpendicular to the plane defined by the {phth(R 2tu)2} 2ligands. While in 8a, both methoxido ligands point to the same side of the described plane and form a syn isomer, the MeOligands in 8b are located at opposite sides and form an anti isomer. Studies in solution show that there exists a reversible equilibrium between the anti and syn isomers. Dimerization/condensation of complexes 8 with the formation of tetranuclear complexes of the composition [{ReO{phth(R 2tu)2}}2O]2 (9) and/or polynuclear species is observed in solutions, which do not contain MeOH. © 2010 American Chemical Society. Year: 2011 Source title: Inorganic Chemistry Volume: 50 Issue: 2 Page : 590-596 Link: Scorpus Link Correspondence Address: Nguyen, H. H.; Department of Chemistry, Hanoi University of Science, 19 Le Thanh Tong, Hanoi, Viet Nam; email: abram@chemie.fu-berlin.de ISSN: 201669 CODEN: INOCA DOI: 10.1021/ic1017642 Language of Original Document: English Abbreviated Source Title: Inorganic Chemistry Document Type: Article Source: Scopus Authors with affiliations: Nguyen, H.H., Department of Chemistry, Hanoi University of Science, 19 Le Thanh Tong, Hanoi, Viet Nam Thang, P.C., Department of Chemistry, Hanoi University of Science, 19 Le Thanh Tong, Hanoi, Viet Nam Rodenstein, A., Institute of Inorganic Chemistry, University of Leipzig, Johannisallee 29, D-04103 Leipzig, Germany