Diammine(pyrazine-2,3-dicarboxylato-N,O)palladium(II): Synthesis, crystal structure, spectroscopic and thermal properties
(1997) Inorganica Chimica Acta — Vol. 258, n° 1, p. 113-118 (1997)
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Devillers, Michel 
- Abstract
- The synthesis, crystal structure and spectroscopic (IR, XPS) characterization of a new Pd complex with 2,3-pyrazinedicarboxylic acid (2,3-H(2)pzdc), Pd(2,3-pzdc)(NH3)(2) (1), are reported. This compound crystallizes in the monoclinic space group P2(1)/c with four molecules in the unit cell. Using 2697 independent reflections up to 2 theta=60 degrees, the structure was refined to R = 0.044. The lattice is formed of isolated zwitterionic moieties in which the square-planar coordination of palladium is ensured by three nitrogen atoms and one oxygen from a carboxylate group attached to the pyrazine ring. Both the structural and the infrared data confirm the absence of a polymeric network. Thermal degradation under nitrogen produces a mixture of palladium metal and PdO at 773 K. The XPS data of 1 are discussed together with those of a related compound with 3,5-pyrazoledicarboxylic acid (H(3)Dcp), (NBu4)(2)[Pd-2(Dcp)(2)] (2) and suggest the presence of a delocalized positive charge in the pyrazine ring.
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Wenkin, M., Devillers, M., Tinant, B., & Declercq, J.-P. (1997). Diammine(pyrazine-2,3-dicarboxylato-N,O)palladium(II): Synthesis, crystal structure, spectroscopic and thermal properties. Inorganica Chimica Acta, 258(1), 113-118. https://doi.org/10.1016/S0020-1693(96)05533-8 (Original work published 1997)