Supramolecular structures 1 and 2 were obtained in the solid state from the reaction between palladium chloride and guanidinium salts of p- and m-pyridinecarboxylic acid, respectively. The pyridinecarboxylate anions were trans-coordinated to palladium dichloride through nitrogen, and the carboxylate groups formed hydrogen bonds with guanidinium cations. The present paper describes a remarkable change in the stoichiometry and structural organization of the solid 3 derived from the meta-substituted acid 2, triggered by the elimination of one guanidine molecule as hydrochloride per molecule of palladium chloride, during crystallization from methanol. The corresponding isonicotinate 1 structure appears to be stable under the same conditions. As shown by the analysis of the crystal structures, the guanidinium nicotinate organic salt 4 turns out to be preorganized to host palladium chloride both in 2 and 3. © Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.

Self-assembly of supramolecular structures from palladium chloride and guanidinium salts of pyridinecarboxylic acids - A dramatic change on passing from the para- to the meta-substituted acid / Bacchi, A.; Chiusoli, G. P.; Costa, M.; Giacobbi, E.. - In: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY. - ISSN 1434-1948. - 2003:8(2003), pp. 1523-1528. [10.1002/ejic.200390198]

Self-assembly of supramolecular structures from palladium chloride and guanidinium salts of pyridinecarboxylic acids - A dramatic change on passing from the para- to the meta-substituted acid

Bacchi A.;Chiusoli G. P.;Costa M.;
2003

Abstract

Supramolecular structures 1 and 2 were obtained in the solid state from the reaction between palladium chloride and guanidinium salts of p- and m-pyridinecarboxylic acid, respectively. The pyridinecarboxylate anions were trans-coordinated to palladium dichloride through nitrogen, and the carboxylate groups formed hydrogen bonds with guanidinium cations. The present paper describes a remarkable change in the stoichiometry and structural organization of the solid 3 derived from the meta-substituted acid 2, triggered by the elimination of one guanidine molecule as hydrochloride per molecule of palladium chloride, during crystallization from methanol. The corresponding isonicotinate 1 structure appears to be stable under the same conditions. As shown by the analysis of the crystal structures, the guanidinium nicotinate organic salt 4 turns out to be preorganized to host palladium chloride both in 2 and 3. © Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.
Self-assembly of supramolecular structures from palladium chloride and guanidinium salts of pyridinecarboxylic acids - A dramatic change on passing from the para- to the meta-substituted acid / Bacchi, A.; Chiusoli, G. P.; Costa, M.; Giacobbi, E.. - In: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY. - ISSN 1434-1948. - 2003:8(2003), pp. 1523-1528. [10.1002/ejic.200390198]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2885037
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