Effects of the substituents of pyrazole/thiazine ligands on nuclearity of Cu(II) nitrate complexes

[Cu(H 2 O)(PzTz) 2 ](NO 3 ) 2 (1), [Cu(μ-NO 3 )(NO 3 )(DMPzTz)] n (2), and [{Cu(NO 3 )(DPhPzTz)} 2 (μ-NO 3 ) 2 ] (3) [PzTz = 2-(1-pyrazolyl)-1,3-thiazine, DMPzTz = 2-(3,5-dimethyl-1-pyrazolyl)-1,3-thiazine, DPhPzTz = 2-(3,5-diphenyl-1-pyrazolyl)-1,3-thiazine] have been prepared and characterized by...

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Bibliographic Details
Published in:Journal of coordination chemistry 2012-10, Vol.65 (20), p.3556-3569
Main Authors: Torres-García, P., VIÑUelas-Zahínos, E., Luna-Giles, F., Bernalte-García, A.
Format: Article
Language:English
Subjects:
Copper(II) complexes
Crystal structures
Ligands
Nuclearity
Pyrazole
Thiazine
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Summary:[Cu(H 2 O)(PzTz) 2 ](NO 3 ) 2 (1), [Cu(μ-NO 3 )(NO 3 )(DMPzTz)] n (2), and [{Cu(NO 3 )(DPhPzTz)} 2 (μ-NO 3 ) 2 ] (3) [PzTz = 2-(1-pyrazolyl)-1,3-thiazine, DMPzTz = 2-(3,5-dimethyl-1-pyrazolyl)-1,3-thiazine, DPhPzTz = 2-(3,5-diphenyl-1-pyrazolyl)-1,3-thiazine] have been prepared and characterized by elemental analysis, electronic spectroscopy, IR spectroscopy, electron paramagnetic resonance spectroscopy, magnetic susceptibility measurements, and single-crystal X-ray diffraction. Influence of ligand size on coordination to Cu(II) has been analyzed. The three complexes are five-coordinate and the coordination geometry can be described as a distorted trigonal bipyramid for 1 or a distorted square pyramid for 2 and 3. As a consequence of the strain induced by the ligands, 1 is a monomeric complex cation whereas 2 is a polymer and 3 is a dimer.
ISSN:0095-8972
1029-0389
DOI:10.1080/00958972.2012.718764