Abstract
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.