Di-μ-chlorido-bis[chlorido(η2-ethene)platinum(II)

Abstract

Zeise's dimer, [Pt2Cl4(C2H4)2)], consists of two independent dimeric mol­ecules in the unit cell, one of which is crystallographically centrosymmetric. All Pt atoms are essentially square planar with bridging and trans terminal chloride groups. The eth­ene groups are orthogonal to the mol­ecular square plane. In the non-centrosymmetric mol­ecule, the two square planes subtend an angle of 160.10 (13)° at the bridging Cl atoms. The crystal structure exhibits layers of molecules running approximately parallel to the (001) face, with a layer of the centrosymmetric dimer stacked directly between two layers of the non-centro­symmetric mol­ecules [Pt⋯Pt = 4.053 (1) and 4.090 (1) A]. Within this stack, the eth­ene groups of the central mol­ecule are located betwen two terminal chloride groups of the adjacent mol­ecules. Adjacent three-layer sandwiches are staggered from each other so that stacking occurs for only one square plane, disrupting any further inter­action by one Pt atom but allowing a weaker Pt⋯Pt inter­action [4.249 (1) A]. The non-centrosymmetric mol­ecule layer exhibits a weak hydrogen bond between a terminal chloride and an ethene H atom of an adjacent mol­ecule.