Synthesis and Crystal Structures of Three New Hetero-binuclear Hg(II)-Cu(II) Schiff Base Complexes

Document Type: Research Paper


1 Hadi Kargar Assistant Prof. of Inorganic Chemistry Department of Chemistry Payame Noor University Ardakan I.R. of Iran e-mail: Tel.: +98-352-7220011 ext. 157 Fax: +98-352-7228110

2 Chemistry Department, Sharif University of Technology, P.O. Box: 11155-3516 , Tehran, Iran


New hetero-binuclear Hg-Cu Schiff base complexes were prepared by reaction of 2,2'-[1,1'-(2,2-‎dimethylpropane-1,3-diyldinitrilo)-diethyldyne]diphenolato}copper(II) (CuL1) and 6,6'-X-2,2'-[(2,2-‎dimethylpropane-1,3-diyl)bis(nitrilomethanylylidene)]diphenolato copper(II) [(X = ethoxy (CuL2) and ‎methoxy (CuL3)], with HgCl2 to give [Cu(L1)HgCl2] (1), [Cu(L2)HgCl2] (2), and [Cu(L3)HgCl2] (3), ‎respectively. In the precursor Cu(II) complexes (CuL1-CuL3), the coordinated phenolic oxygen atoms and ‎those of the substituents at 3,3'-positions (in 2 and 3) on aromatic ring can act as additional site of ‎coordination to HgCl2 as metallo-ligand to make heterobinuclear Cu-Hg complexes. The H2L1, H2L2, and H2L3 ‎Schiff base ligands were characterized by elemental analyses, 1H NMR and FT IR techniques. The related ‎binuclear Cu-Hg complexes were characterized by elemental analyses and single-crystal X-ray diffraction. The ‎main coordination sites for the HgCl2 unit are phenolic oxygen atoms and there are also short intramolecular ‎Hg…O (methoxy, and ethoxy segments) contacts in 2 and 3. The crystal packing of 3 shows one-dimensional ‎extended chains along the b-axis through pair of centro-symmetric C–H…Cl interactions. The new complexes ‎crystallize in Pbca (1), P21/n (2), and P21/c (3) space groups. ‎


[1] A.D. Granovski, A.L. Nivorozhkin, V.I. Minkin,
Coord. Chem. Rev. 126 (1993) 1.
[2] O. Atakol, C. Arici, M.N. Tahir, A. Kenar, D. Ulku,
Acta Cryst. C55 (1999) 1416.
[3] P.J. Blower, Transition Met. Chem. 23 (1998) 109.
[4] D. Cunningham, P. McArdle, Mitchell, N.
Chonchubhair, M. O’Gara, F. Franceschi, C. Floriani,
Inorg. Chem. 39 (2000) 1639.
[5] D. Cunningham, J.F. Gallagher, T. Higgins, P.
McArdle, D. Sheerin, J. Chem. Soc., Chem. Commun.
(1991) 432.
[6] S.D. Angelis, E. Solari, E. Gallo, C. Floriani, A.
Chiesi-Villa, C. Rizzoli, Inorg. Chem. 35 (1996)
[7] D. Grdenic, Rev. Chem. Soc. 19 (1965) 303.
[8] F.A. Cotton, G. Wilkinson, Anorganische Chemie,
Weinheim, Interscience Publishers, 1967.
[9] N.L. Holy, N.C. Baezinger, R.M. Flyn, D.C.
Swendon, J. Am. Chem. Soc. 98 (1976) 7823.
[10] I. Ercan, F. Ercan, C. Arici, O. Atakol, Acta Cryst.
C58 (2002) m137.
[11] F.B. Kaynak, D. Ulku, O. Atakol, D. Durmu, Acta
Cryst. C55 (1999) 1784.
[12] E.C. Constable, G. Zhang, C.E. Housecroft, J.A.
Zampese, Dalton Trans. 39 (2010) 1941.
[13] Stoe & Cie, X-AREA, version 1.52: Program for the
Acquisition and Analysis of Data; Stoe & Cie GmbH:
Darmstadt, Germany, 2005.
[14] R.H. Blessing, Acta Cryst. A51 (1995) 33.
[15] A.L. Spek, Acta Cryst. D65 (2009) 148.
[16] G.M. Sheldrick, Acta Cryst. A64 (2008) 112.
[17] H.H. Yaoy, W.T. Huangy, J.M. Loz, F.L. Liaox, P.
Chattopadhyay, J. Coord. Chem. 58 (2005) 975.
[18] H. Kargar, R. Kia, M.N. Tahir, Private
[19] H. Kargar, R. Kia, H.K. Fun, A. Jamshidvand, Acta
Cryst. E65 (2009) m515.
[20] H. Kargar, R. Kia, H.K. Fun, Private communication.
[21] F.H. Allen, O. Kennard, D.G. Watson, L. Brammer,
A.G. Orpen, R. Taylor, J. Chem. Soc. Perkin Trans. 2
(1987) S1.
[22] N.N. Greenwood, A. Earnshaw, Chemistry of the
Elements, Oxford: Pergamon Press, 1994.
[23] A. Bondi, J. Phys. Chem. 68 (1964) 441.

Volume 1, Issue 1
Summer and Autumn 2017
Pages 40-49
  • Receive Date: 13 May 2014
  • Accept Date: 13 May 2016