In the crystal structure of the title compound, [Cu-II {N(CN)(2)}(2) (C5H5N
O)(2)], the geometry around the copper(II) ion is distorted square pyramida
l, with the basal plane formed by the N atoms of two 3-hydroxypyridine mole
cules, one N atom of a bidentate dicyanamide anion and one N atom of a mono
dentate dicyanamide anion. The apical position is occupied by an N atom of
a bidentate dicyanamide anion, forming a one-dimensional polymeric chain.