Introduction of an Unsaturated Functionality

The Pt2S2 core is formally coordinatively and electronically saturated since the 16-electron d centre is effectively stable to addition reactions. However, upon metallation, it is possible to introduce unsaturation to the system when the metal carries along a labile ligand such as cycloocta-1,5-diene (cod). This is exemplified in the synthesis of [Pt3(cod)(PPh3)4( 3-S)2] and [Pt2Pb-(N03)2(PPh3)4(/i3-S)2]. This transformation from a Lewis basic to a Lewis acidic complex is accompanied by alteration of its chemical reactivity and coordination 

Exploring New Structures Based on Chatt s Pt2S2 Core 

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