The synthesis and structure of two novel metal-di-2-pyridyl ketone oxime dimers

• Published in: Inorganica Chimica Acta 1995, Vol.238 (1), p.149-153
• Main Authors: Sommerer, Shaun O., Westcott, Barry L., Jircitano, Alan J., Abboud, Khalil A.
• Format: Article
• Language: English
• Subjects: 2-Pyridyl ketone oxime complexes; Copper complexes; Crystal structures; Dinuclear complexes; Silver complexes
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/0020-1693(95)04697-8

Single crystals of bis- N) N′, N″-di-2-pyridylketone oxime- O-nitratosilver(I)) ( I) and di- μ-chlorobis(( N, N″-2-pyridyl-2′-pyridinium ketone oxime)aquchlorocopper(II)) ( II) were isolated from aqueous solutions and have been structurally characterized. The crystals of I were found to contain neutral dimers of Ag(di-2-pyridylketone oxime)NO 3 where both Ag(I) cations have obtained a CN = 4 and the geometry around the metal centers can be described as distorted tetrahedra. The structure of II revealed that di-2-pyridylketone oxime (dpk-o) does not bridge the metal centers but coordinates separately to the Cu cations through one pyridine N and the N of the Schiff base function. The nitrogen of the second pyridine ring is protonated and is not involved in coordination. Both Cu cations obtain a CN = 6 if one includes CuCl bond lengths up to 3.053(3) Å in the coordination sphere of the Cu cation. The geometry around each Cu can then be described as a distorted octahedron.