Inorganic Chemistry, Vol.47, No.21, 9760-9762, 2008
The Zero-Field-Splitting Parameter D in Binuclear Copper(II) Carboxylates Is Negative
High-field, high-frequency electron paramagnetic resonance measurements performed on two binuclear copper complexes, [Cu(CH3COO)(2)](2)(H2O)(2) (1) and [Cu(CH3COO)(2)](2)(pyrazine) (2), allowed a definitive determination of the sign of the zero-field-splitting parameter D. Contrary to literature reports, that parameter is negative in each complex.