Portal de Periódicos da CAPES

Studies on metal carboxylates—VII[1]

1975; Pergamon Press; Volume: 37; Issue: 1 Linguagem: Inglês

10.1016/0022-1902(75)80127-8

1878-1225

Jean‐Claude Michel, Richard A. Walton,

Crystal structures of chemical compounds

Abstract The reactions between pyridine—2,6-dicarboxylatonickel(II) trihydrate and the nitrogen donors pyridine, α-picoline, 2,2′-bipyridyl, 1,10-phenanthroline, ethylenediamine and pyridine—2-carbaldehyde 2′-pyridylhydrazone (paphy) afford six coordinate nickel(II) species which have been characterized by spectral and magnetic susceptibility studies at room temperature. In the reactions with the bidentate donors (B) 2,2′-bipyridyl and 1,10-phenanthroline, the 1:1, 1:2 and 1:3 complexes, [Ni(B)(dipic)(H2O)]. xH2O (blue-green), [Ni(B)2(H2O)2](dipic). xH2O (brown) and [Ni(B)3](dipic). xH2O (red) are generated, and all except [Ni(bipy)3](dipic). xH2O have been isolated pure in the solid-state. The 1:2 and 1:3 complexes with these bidentate nitrogen donors and the 1:3 complex with ethylenediamine are the first transition metal derivatives to have been isolated in which the dianionic dipic ligand is not coordinated to the central metal atom.