Elsevier

Polyhedron

Volume 6, Issue 5, 1987, Pages 1059-1064
Polyhedron

Reactions of palladium (II) chloride with 1,4 - diphenyl - 2,3 - dimethyl - 1,4 - diazabutadiene and 1,4-DI(p-methoxyphenyl)-2,3-dimethyl- 1,4 - diazabutadiene

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Abstract

The reactions of palladium(II) chloride with 1,4 - diphenyl - 2,3 - dimethyl - 1,4 - diazabutadiene and 1,4 - di(p - methoxyphenyl) - 2,3 - dimethyl - 1,4 - diazabutadiene are described. With 1,4 - diphenyl - 2,3 - dimethyl - 1,4 - diazabutadiene diimine fission is produced, giving rise to a product identified by elemental analysis, IR and Raman spectra, and X-ray diffraction, as trans-dichlorobis(aniline) palladium(II). The complex is soluble in dimethylformamide and crystallizes with two molecules of solvent. The substance crystallizes in the monoclinic space group P21/n. The X-ray data were refined to R = 0.047 and Rw = 0.046. Final distances are Pdsingle bondN = 2.060(5)Åand Pdsingle bondC1 = 2.299(2)Å. There are two bifurcated intermolecular Nsingle bondH ... C1 and Csingle bondH... C1 hydrogen bonds which, together with one more intermolecular hydrogen bond Nsingle bondH... O, are responsible for the packing of the molecules. However, when 1,4 - di(p - methoxyphenyl) - 2,3 - dimethyl - 1,4 - diazabutadiene was treated with palladium chloride under the same conditions cis - dichloro - 1,4 - di(p - methoxyphenyl) - 2,3 - dimethyl - 1,4 - diazabutadiene was formed, as deduced from elemental analysis, and IR and Raman spectra.

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