RESUMEN
The crystal spectrum of hexakis(imidazole)nickel(II)nitrate from 7000 cm-1 to 30,000 cm-1 at liquid nitrogen temperature has been measured. Three spin-allowed and three spin-forbidden bands in this spectrum were assigned on the basis of octahedral ligand field symmetry. These assignments are compared with those made in several related materials. Important differences and similarities in spectral detail and their bearing on assignments in other strong field nickel(II) complexes, are discussed.
RESUMEN
The electron absorption spectrum of cobalt(II)-doped trisphenanthrolinezinc nitrate dihydrate has been observed at room temperature and at 77 °K. Broad bands appear at 10,750 and 22,000 cm-1 which are assigned to the 4T1g (F) â â 4T2g (F) and the 4T1g (F) â â 4T1g (P) transitions respectively. A broad weak band occurs near 19,000 cm-1 but at 77 °K this band is resolved into a series of narrower bands. These bands are assigned to 2G transitions. The relationship between the spectrum of cobalt(II) trisphenanthrolinezinc nitrate dihydrate and the solution spectra of cobalt(II) in ammonia and ethylenediamine is discussed.
RESUMEN
The electronic and electron spin resonance spectra of bis-N-propylsalicylaldiminato copper (II) have been measured. The measurements show that the g-tensor has some rhombic character with g z = 2.225, g x = 2.064, and g y = 2.038. Four d-d transitions were observed in the electronic spectrum at 14,800, 16,800, 19,800, and 22,000 cm-1. A consistent set of assignments has been made based on the polarization data of the bands. These results are compared to the results from other similar molecules.