Abstract
Several six-coordinated, spin-paired COL2.NO3.H2O complexes were prepared, characterized through IR and electronic spectra, and found to be non-electrolytes. LH is a 1-aryl-3-methyl-4-acyloxime-2-pyrazolin-5-one (Ar is phenyl or 3-chlorophenyl; in the acyloxime R‒C = NOH, R may be H, Me, Et, Pr, CH2Cl or phenyl).