The Transition-metal Chemistry of Quinuclidinone-containing Ligands. Part VI
A study of the thermal properties of several complexes with trans-2-(2-quinolyl)methylenequinuclidin-3-one
A thermochemical determination of the relative solid-state stabilities of the yellow [Ni(qnqn)Cl22] and violet [Ni(qnqn)Cl2] isomers (where qnqn is trans-2-(2-quinolyl)methylenequinuclidin-3-one) has indicated that the violet isomer is the metastable isomer at room temperature. D.t.a.-t.g. measurements have been obtained for the iron, cobalt, nickel, and copper chloride and nickel bromide complexes of qnqn and reveal in the case of the nickel chloride isomers an endothermic structural transformation of the yellow dimer to the violet monomer at 230 °C. No related transformation is observed in the remaining complexes. The unusual inter-related thermal properties of the nickel chloride isomers are discussed in terms of the various properties of the two complexes.
G. J. Long et al., "The Transition-metal Chemistry of Quinuclidinone-containing Ligands. Part VI," Journal of the Chemical Society, Dalton Transactions, Royal Society of Chemistry, Jan 1975.
The definitive version is available at https://doi.org/10.1039/DT9750000762
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© 1975 Royal Society of Chemistry, All rights reserved.