The synthesis and structural characterization of the mol. complexes [CoIII(h5-C5H4CONHC5H4N)2][PF6] (1), [CoIII(h5-C5H4CONHC5H4NH)(h5-C5H4COO)][PF6] (2), and of the supramol. adducts [CoIII(h5-C5H4CONHC5H4N)2][Fe(h5-C5H4COOH)2][PF6] (3) and [CoIII(h5-C5H4COO)2](-)[(C16H9CH2NH3)](+) (4) are reported together with an investigation of the hydrogen-bonding interactions in the solid state. Compd. [CoIII(h5-C5H4CONHC5H4NH)(h5-C5H4COO)](+) has been described as a cationic zwitterion in view of the charge sepn. arising from deprotonation of the carboxylic group and protonation of the pyridine moiety on the parent compd. [CoIII(h5-C5H4CONHC5H4N)(h5-C5H4COOH)](+). The complex forms a supramol. dimer via charge-assisted N-H...O hydrogen bonds, topol. analogous to the mixed metal supramol. complex [CoIII(h5-C5H4CONHC5H4N)2](+)[Fe(h5-C5H4COOH)2], which has also been prepd. and characterized. The differences in hydrogen bonding have been analyzed.
D. Braga, M. Polito, F. Grepioni, (2004). Novel Organometallic Building Blocks for Molecular Crystal Engineering. 3. Synthesis, Characterization, and Hydrogen Bonding of the Crystalline Mono- and Bis-Amide Derivatives of [CoIII(h5-C5H4-COOH)2]+ and of the Cationic Zwitterion [CoIII(h5-C5H4CONHC5H4NH)(h5-C5H4COO)]+. CRYSTAL GROWTH & DESIGN, 4, 769-774 [10.1021/cg049942w].
Novel Organometallic Building Blocks for Molecular Crystal Engineering. 3. Synthesis, Characterization, and Hydrogen Bonding of the Crystalline Mono- and Bis-Amide Derivatives of [CoIII(h5-C5H4-COOH)2]+ and of the Cationic Zwitterion [CoIII(h5-C5H4CONHC5H4NH)(h5-C5H4COO)]+.
BRAGA, DARIO;POLITO, MARCO;GREPIONI, FABRIZIA
2004
Abstract
The synthesis and structural characterization of the mol. complexes [CoIII(h5-C5H4CONHC5H4N)2][PF6] (1), [CoIII(h5-C5H4CONHC5H4NH)(h5-C5H4COO)][PF6] (2), and of the supramol. adducts [CoIII(h5-C5H4CONHC5H4N)2][Fe(h5-C5H4COOH)2][PF6] (3) and [CoIII(h5-C5H4COO)2](-)[(C16H9CH2NH3)](+) (4) are reported together with an investigation of the hydrogen-bonding interactions in the solid state. Compd. [CoIII(h5-C5H4CONHC5H4NH)(h5-C5H4COO)](+) has been described as a cationic zwitterion in view of the charge sepn. arising from deprotonation of the carboxylic group and protonation of the pyridine moiety on the parent compd. [CoIII(h5-C5H4CONHC5H4N)(h5-C5H4COOH)](+). The complex forms a supramol. dimer via charge-assisted N-H...O hydrogen bonds, topol. analogous to the mixed metal supramol. complex [CoIII(h5-C5H4CONHC5H4N)2](+)[Fe(h5-C5H4COOH)2], which has also been prepd. and characterized. The differences in hydrogen bonding have been analyzed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
