Syntheses and crystal structures of Cu(II) and Zn(II) complexes of 2,2′-dipyridyl( N-propenyl)amine

• Published in: Polyhedron Vol. 20; no. 24; pp. 2935 - 2943
• Main Authors: Coombs, Timothy D., Brisdon, Brian J., Curtis, Christopher P., Mahon, Mary F., Brewer, Stuart A., Willis, Colin R.
• Format: Journal Article
• Language: English
• Published: OXFORD Elsevier Ltd 15.11.2001; Elsevier
• Subjects: 2,2′-Dipyridyl( N-propenyl)amine; Chemistry; Chemistry, Inorganic & Nuclear; Copper; Crystal structures; Crystallography; Nitrates; Physical Sciences; Science & Technology; Zinc; Crystal structures; Nitrates; 2,2′-Dipyridyl( N-propenyl)amine; Copper; Zinc; LIGANDS; 2,2 '-dipyridyl(N-propenyl)amine; MEMBRANES; copper; 2,2'-DIPYRIDYLAMINE; nitrates; LUMINESCENT ZINC(II) COMPLEXES; zinc; crystal structures
• ISSN: 0277-5387
• DOI: 10.1016/S0277-5387(01)00877-4

Reaction between copper(II)- and zinc(II)-nitrates and 2,2′-dipyridyl( N-propenyl)amine (Prdpa) affords 1:1 complexes M(Prdpa)(NO 3) 2 (M=Cu, 1; M=Zn, 5) for both metal ions and a 1:2 adduct M(Prdpa) 2(NO 3) 2 ( 2) for copper only. In ethanol 1 dissociates to form 2 and copper nitrate. X-ray diffraction studies on 1, 2 and 5, and on the 2,2′-dipyridylamine (Hdpa) analogue of 1, Cu(Hdpa)(NO 3) 2 ( 4), are reported. The metal centres exhibit square pyramidal ( 1) or distorted octahedral ( 2, 4, 5) primary coordination spheres. Bridging nitrate groups linking Cu atoms in 1 and 4 result in CuONOCu chains, which in the case of 4 are extensively cross-linked by N−H⋯ONO 2 H-bonding into 3D-arrays. Intermolecular C−H⋯ONO 2 interactions are apparent in the solid-state structure of 2. The structural effects of replacing the NH atom on Hdpa by a propenyl group in 6-coordinate Cu(II) complexes are assessed. The coordination chemistry of 2,2′-dipyridyl( N-propenyl)amine (Prdpa) towards Cu(II) and Zn(II) nitrates has been explored. The structures of two of the resulting 1:1 complexes, M(Prdpa)(NO 3) 2, M=Cu ( 1); M=Zn ( 5) and one 1:2 adduct, Cu(Prdpa) 2(NO 3) 2 ( 2) have been determined. The structural effects of replacing the NH atom in 2,2′-dipyridylamine by a propenyl group in 6-coordinate Cu(II) complexes have been assessed. These include the ability of Prdpa to promote intermolecular C−H⋯ONO 2 interactions.