Paramagnetic susceptibilities and anisotropies of nickel(II) ions in ‘tetrahedral’ environments. Part II. Covalency and distortion in tetraethylammonium tetrachloronickelate(II), and bis-(N-isopropyl-salicylaldiminato)nickel(II)
- 1 January 1969
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 1022-1028
- https://doi.org/10.1039/j19690001022
Abstract
The magnetic susceptibilities of single crystals of tetraethylammonium tetrachloronickelate(II) and bis-(N-isopropylsalicylaldiminato)nickel(II) have been measured over the temperature range 90–300°K. The anisotropy of the chloro-complex is characterized by a reversible discontinuity at ca. 218° associated with a small thermal hysteresis. The principal susceptibilities have been fitted to a theoretical spin–triplet model. The Cl–Ni–Cl angles calculated from the magnetic data of the chloro-compound above the transition temperature agree very well with those deduced from the room-temperature X-ray structure analysis. Orbital reduction factors and spin–orbit coupling coefficients for both complexes have been determined and are discussed.Keywords
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