Ali. R Rezvani - Department of Chemistry, University of Sistan and Baluchestan,P. O. Box ۹۸۱۳۵-۶۷۴, Zahedan, Iran
Hassan Hadadzadeh - Department of Chemistry, Isfahan University of Technology, Isfahan ۸۴۱۵۶-۸۳۱۱۱, Iran
Hamideh Saravania - Department of Chemistry, University of Sistan and Baluchestan,P. O. Box ۹۸۱۳۵-۶۷۴, Zahedan, Iran
Ghobad Mansouri - Department of Chemistry, University of Sistan and Baluchestan,P. O. Box ۹۸۱۳۵-۶۷۴, Zahedan, Iran

New five-coordinated CuII complexe, [Cu(terpy)(phen-dione)](PF6)2, (terpy= 2,2';6',2 - terpyridine and phen-dione=1,10-phenanthroline-5,6-dione) has been prepared.The complex of [Cu(terpy)(phen-dione)](PF6)2 crystallized with one molecule of acetonitrile with empirical formula C29 H20 Cu F12 N6 O2 P2, in a monoclinic crystalsystem and space group of P21/c with a= 8.440(2)Å, b= 26.067(5)Å, c= 15.015(3)Å, β= 92.855(18)º, V=3299.1(12)Å3 and Z=4.ORTEP drawing of [Cu(terpy)(phendione)]( PF6)2.CH3CN shows that the coordination geometry around CuII is a distorted square- pyramidal. Due to steric hidereance of PF6 - in unit cell, the terpy ligands in each complex cations can not interact via the two π- electronic systems.

CuII complex; 1,10-Phenanthroline-5,6-dione; Crystal structure; Ligand – to- metal charge –transfer