CRYSTAL AND MOLECULAR-STRUCTURE OF AQUA SPERMINE COPPER(II) SULFATE TRIHYDRATE STUDIED BY X-RAY AND IR SPECTROSCOPY

The title compound [(C10H26N4).Cu+2.H2O].SO4(-2).3H2O[A] has been studied by X-ray diffraction and IR spectroscopy. It crystallized in monoclinic system, in space group P 2(1)/c, with cell dimensions of a = 8.128(2), b = 15.472(2), c = 15.350(2) angstrom, beta = 102.66(2)-degrees. The copper atom is five coordinated with four nitrogen atoms and one axial water molecule forming tricyclic chelated spermine complex. The chelated complex consists of two six-membered and one seven-membered rings. The seven membered ring is disordered. The amine groups from spermine molecule are hydrogen bonded to the sulphate anion and the water molecule. All water molecules form an infinitive hydrogen bonding network utilizing sulphate anions as bridges. The IR analysis before and after dehydration of [A] agree with the X-ray results.