A new solid isomeric form (α) of Cu(NCO)2py2 was obtained as a first reaction product of copper nitrate, potassium cyanate and pyridine. This form can be transformed into the already known β form by recrystallization. Comparison of the spectroscopic and spectromagnetic properties of the two isomers suggests the absence of significant intermolecular interactions in the α form, the β one being characterized by a pseudo-bridging position of the NCO groups. The difference in the relative orientation of the tetragonal axes of the copper centers is responsible for different exchange coupling effects between the metal ions. © 1990.
Morazzoni, F., Pozzi, A., Rossi, M., Scotti, R., Ravasio, N. (1990). CYANATO COPPER(II) COMPLEXES WITH PYRIDINE - SYNTHESIS AND CHARACTERIZATION OF 2 ISOMERIC FORMS. INORGANICA CHIMICA ACTA, 175(2), 277-280 [10.1016/S0020-1693(00)84838-0].
CYANATO COPPER(II) COMPLEXES WITH PYRIDINE - SYNTHESIS AND CHARACTERIZATION OF 2 ISOMERIC FORMS
MORAZZONI, FRANCA;SCOTTI, ROBERTO;
1990
Abstract
A new solid isomeric form (α) of Cu(NCO)2py2 was obtained as a first reaction product of copper nitrate, potassium cyanate and pyridine. This form can be transformed into the already known β form by recrystallization. Comparison of the spectroscopic and spectromagnetic properties of the two isomers suggests the absence of significant intermolecular interactions in the α form, the β one being characterized by a pseudo-bridging position of the NCO groups. The difference in the relative orientation of the tetragonal axes of the copper centers is responsible for different exchange coupling effects between the metal ions. © 1990.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.