Cyclopentadienylcobalt sulfide and selenide cluster compounds: synthesis and structural characterizations

摘要

The reaction of CpCo(CO)(2) with elemental sulfur yielded the new sulfur-rich compound CP4Co4(mu(3)-S)(mu(3)-S-2)(3) (1). The structure of 1 contains a Co4S7 core composed of three mu(3)-disulfido ligands and one mu(3)-sulfido ligand. PEt3 abstracts sulfur from 1 to yield the new compound Cp4Co4(mu(3)-S)(3)(mu(3)-S-2) (2). Compound 2 is also a cage compound, but it contains three mu(3)-sulfido ligands and only one mu(3)-disulfido ligand. Compound 2 is converted back to 1 by reaction with elemental sulfur. The selenium homologue Cp4Co4(mu(3)-Se)(3)(mu(3)-Se-2) (3) was obtained from the reaction of CpCo(CO)2 with elemental selenium. The structures of 1, 2 and 3 were determined by single-crystal X-ray diffraction analyses. (c) 2004 Elsevier B.V. All rights reserved.