A Dinuclear Pd Complex with the bis(Pyridyltriazole) Ligand m-xpt: [Pd2(m-xpt)2](DMSO)6(BF4)4

Abstract The title compound ( 1 ) was synthesized through reaction between Pd(CH 3 CN) 4 (BF 4 ) 2 and m -xylylenebis(pyridyltriazole) ( m -xpt) in a mixture of CH 2 Cl 2 and CH 3 CN. The solid product was crystallized by vapor diffusion of ethyl ether into a DMSO solution. In the crystal structure of 1 , square-planar trans -[Pd(pyridyltriazole) 2 ] 2+ groups are joined by m -xylylene bridges to make centrosymmetric [Pd 2 ( m -xpt) 2 ] 4+ cations with Pd⋯Pd = 5.1337(4) Å. As in previously published structures with the isomeric o -xpt ligand, ([Ag 2 ( o -xpt) 2 ] 2+ and [Pd 2 ( o -xpt) 2 ] 4+ ), the Pd(pyridyltriazole) 2 planes in 1 make close π contact (3.302 Å); this is accomplished by twisting of the m -xpt bridging groups, so that the longer Pd⋯Pd vector makes a 40° angle with the Pd(pyridyltriazole) 2 planes. Graphical Abstract The crystal structure of the title compound shows a Pd⋯Pd distance approximately as expected (5.1337(4) Å), but with its m -xylylene groups twisted in order to permit close π–π interactions (3.302 Å) between its Pd(pyridyltriazole) 2 planes.