Abstract
The heterometallic complex (CO)3(PPh3)Re(μ-SPr)Pt(PPh3)(CO) (I) was formed in the reaction of Re2(μ-SPr)2(CO)8 with (PPh3)2Pt(C2Ph2), together with (CO)3(PPh3)Re(μ-SPr)2Re(CO)4 (II), which was also prepared by an alternative synthesis. Compounds I and II were characterized by X-ray diffraction. In I, the Re-Pt single bond, 2.7414(5) A, is supplemented by a thiolate bridge with shortened bonds: Pt-S (2.336(2) A) and Re-S (2.449(2) A). The Re-P (2.469(2) A) and Pt-P (2.329(2) A) bonds are also shortened. Complex II resulting from replacement of one CO group in the starting rhenium complex by triphenylphosphine has no M-M bond, and the Re-S and Re-P bond lengths (2.511(2)–2.527(2) and 2.517(3) A) are close to the length of single bonds. It is assumed that the platinum atom in I is attached to the formally double bond Re ⇆ SPr arising upon dissociation of Re2(μ-SPr)2(CO)8.
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