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Diaquabis(3-methylpyridine-2-carboxamide-κ2N,O)copper(II) dinitrate

✍ Scribed by Ruan, Hong ;Chen, Hong-Wei ;Xuan, Ri-Cheng

Publisher
International Union of Crystallography
Year
2007
Tongue
English
Weight
498 KB
Volume
63
Category
Article
ISSN
1600-5368

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✦ Synopsis

The title compound, [Cu(C 7 H 8 N 2 O) 2 (H 2 O) 2 ](NO 3 ) 2 , was prepared by the reaction of 2-cyano-3-methylpyridine with Cu(NO 3 ) 2 Á3H 2 O in a methanol/water solution. In the crystal structure, the Cu II ion is located on an inversion centre and is coordinated by two 3-methylpyridine-2-carboxamide ligands in the equatorial plane and two water molecules in the axial positions, forming an elongated octahedral coordination geometry. The Cu-O axial bond distance of 2.4715 (18) A ˚is much longer than the Cu-O equatorial bond distance of 1.9471 (17) A ˚, showing a Jahn-Teller distortion. The nitrate anions are linked with the Cu II complex cation via O-HÁ Á ÁO hydrogen bonding.

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