A novel chiral dinuclear Cu(II) cluster [Cu-2(bPca)(bpy)(H2O)(NO3)(3)] (1) (bpca(-) is the anion of bis (2-pyridylcarbonyl)amine and bpy is 2,2'-bipyridine), was synthesized and characterized. Single crystal X-ray diffraction analysis showed that the two Cu(II) ions in complex 1 are sitting in a distorted octahedral arrangement and bridged by the organic spacer bpca(-). Hydrogen bonding links neighboring dinuclear units into a three-dimensional framework. Inversion crystallographic symmetry gives dimers as either A or A isomers. Racemization of complex 1 was confirmed by circular dichroism (CD) spectros-copy. The temperature dependence of the magnetic susceptibility for complex 1 in the range 2-300 K indicates the presence of ferromagnetic Cu center dot center dot center dot Cu exchange. The data fitting gave the magnetic coupling constant J = 8.08 cm(-1).