Carbon–phosphorous bond cleavage on a platinum centre. Crystal structure of sym- cis-[Pt(μ-PPh 2)(PPh 2CH 2CH 2S– P, S)] 2

Abstract

The complex [Pt(dppet– P, S) 2] (Hdppet=PPh 2CH 2CH 2SH) that had been synthesized previously from K 2PtCl 4 and Hdppet in the presence of base with moderate yields (ca. 50%), has been prepared in high yield (ca. 95%) in the absence of base. [Pt(dppet– P, S) 2] is stable in the air, in the presence of acid (2 M HCl) and in refluxing toluene, but in the sun light it turns into binuclear sym- cis-[Pt(μ-PPh 2)(dppet– P, S)] 2 ( 1). The crystal structure of 1 revealed a non-crystallographically planar Pt 2P 4S 2 core with open μ-P–Pt–P(dppet) angles (102, 104°) and similar μ-P–Pt distances of 2.311(4), 2.318(5), 2.302(5), 2.324(5) Å, little influenced by the trans ligand.