Hydrolytic ring opening reactions of anhydrides for first row transition metal dicarboxylate complexes
摘要:
Ring opening reactions of 2,3-pyridine dicarboxylic anhydride are studied with hydrated salts of cobalt, nickel and zinc. The hydrated metal salts preferentially hydrolyze 2,3-pyridine dicarboxylic, anhydride rather than causing esterification in methanol medium. Hydrolytic opening of 2,3-pyridine dicarboxylic anhydride by hydrated cobalt(II) acetate and nickel(II) acetate resulted in the corresponding chelate complexes of monodeprotonated 2,3-pyridine dicarboxylic acid. The reaction of copper acetate with pyromellitic dianhydride in the presence of 1,10-phenanthroline gives a dinuclear copper complex whereas a similar reaction with copper(II) chloride gives a mononuclear copper complex. (c) 2007 Elsevier Ltd. All rights reserved.
A Hydrated Cobalt(II) Complex of Quinolinic Acid: trans-[Co(C7H4NO4)2(H2O)2]
作者:N. Okabe、J. Miura、A. Shimosaki
DOI:10.1107/s0108270196002314
日期:1996.7.15
In trans-diaquabis(2,3-pyridinedicarboxylato-N,O)-cobalt(Il), the Co atom lies on an inversion centre and has distorted octahedral coordination defined by two pyridine N atoms, two carboxylato O atoms and two water O atoms. The deprotonated carboxylate group at position 2 and the protonated carboxy group at position 3 are located nearly in the plane of the pyridine ring and are linked by an intramolecular hydrogen bond. The crystal structure is stabilized by intermolecular O-H ... O hydrogen bonds between carboxy and water O atoms.