An Ionic Pair Complex Containing Bis(maleonitriledithiolato)palladium(II) Anion and Substituted 4-Dimethylaminopyridinium: Synthesis, Weak Interactions and 3D Network Structure.

An ionic pair complex, [FClBzDMAP]2[Pd(mnt)2] (1) , ([FClBzDMAP]+ = [1-(4'-fluoro-2'-chlorobenzyl)-4-dimetylamino pyridinium, mnt2- = maleonitriledithiolate), was synthesized and characterized by elemental analyses, IR, UV-vis spectra, molar conductivities and single crystal diffraction. The crystal belongs to the triclinic system, space group P-1 with cell constants a = 8.3472(8) Å, b = 9.3988(9) Å, c = 13.5875(14) Å, α = 76.676(1)°, β = 86.036(1)°, γ = 71.182(1)°, Z = 1. It is interesting that the [FClBzDMAP]+ cations (C) and the [Pd(mnt)2]2- anions (A) in 1 stack into a 1D alternating CC-A-CC-A-CC column along ab direction, while the cations form a 1D column along bc direction. Some weak interactions such as p ... π, π ... π, Cl ... S, and C─ H ... N interactions in the crystal play important roles in the self-assembly process and give rise to a 3D network structure. [ABSTRACT FROM AUTHOR]