Synthesis and Structure of A Carboxyl-Bridged Heteronuclear Copper-Terbium Complex: [CuTb(CH₂C(CH₃)COO)₅(PHEN)(H₂O)]₂

The title complex has prepared by the reaction of TbL₃, Cu(NO₃)₂ and phen in H₂O/EtOH (where L= f -methylacrylato; phen = 1,10-phenanthroline) and its structure determined by X-ray diffraction methods. The complex crystallizes in the triclinic space group PI with Z = 1, a = 11.569(2), b = 14.584(3), c = 11.479(2) Å, f = 101.03(2), g = 104.37(2), n = 74.01(1)°, and the structure was refined to R = 0.041 for 6463 observed reflections. The structure contains a discrete tetranuclear CuTbTbCu molecule. Copper(II) and terbium(III) are bridged by three bidentate carboxyl groups with a Tb ··· Cu separation of 3.9059(9) Å. The Tb ion is eight coordinate and exhibits a distorted square antiprism. The Cu ion is five coordinate and has distorted pyramidal geometry.

Keywords:

• Copper
• Terbium
• Heteronuclear
• Crystal Structure