Abstract
The i.r. and electronic absorption spectra of the previously reported adduct Cu(pic) 2,KSCN and the new adduct Cu(pic) 2,KOCN are reported. The data suggests that the thiocyanate adduct is correctly formulated as [Cu(pic)[ 2]KSCN involving four coordinate copper(II) in agreement with an X-ray structural determination. The cyanate adduct, however, is more correctly formulated as K[Cu(pic) 2(OCN)], involving a penta-coordinated copper(II) ion.
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