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Journal of Coordination Chemistry Volume 64, 2011 - Issue 22
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Original Articles

Synthesis and characterization of new Ni(II) complexes with S,N-heterocycle ligands: influence of the steric strain of ligands on coordination

P. Torres-García Department of Organic and Inorganic Chemistry, University of Extremadura, 06071 Badajoz, Spain
,
R. Pedrero-Marín Department of Organic and Inorganic Chemistry, University of Extremadura, 06071 Badajoz, Spain
,
F. Luna-Giles Department of Organic and Inorganic Chemistry, University of Extremadura, 06071 Badajoz, Spain
,
E. Viñuelas-Zahínos Department of Organic and Inorganic Chemistry, University of Extremadura, 06071 Badajoz, SpainCorrespondence[email protected]
&
F.J. Barros-García Department of Organic and Inorganic Chemistry, University of Extremadura, 06071 Badajoz, Spain
Pages 3887-3899 | Received 26 Jul 2011, Accepted 22 Sep 2011, Published online: 08 Nov 2011
 
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Abstract

The complexes [NiCl2(PyTn)2] · 2H2O (1), [Ni(H2O)2(PyTn)2](NO3)2 (2), [Ni(H2O)2(PzTz)2]Cl2 (3) and [Ni(H2O)2(PzTz)2](NO3)2 (4) [PyTn = 2-(1-pyrazolyl)-2-thiazoline; PzTz = 2-(1-pyrazolyl)-1,3-thiazine] have been prepared and characterized by elemental analysis, electronic spectroscopy, IR spectroscopy and single crystal X-ray diffraction to determine if the size of the S,N-heterocycle influences coordination to Ni(II). The four complexes are six coordinate as a distorted octahedron. The disposition of chlorides and water is trans in 1 and 2, whereas 3 and 4 are cis, as a consequence of the steric strain induced by the larger S,N-ring.

Acknowledgements

The authors would like to thank the Junta de Extremadura (III and IV PRI+D+I) and the FEDER (Project nos. PRI08A022 and GR10138) for financial support.

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