Homo- and Heteroleptic 8-Quinaldinolate Complexes From Elevated-temperature Rearrangements
Glen B. Deacon A , Peter C. Junk B C , David R. Turner A C and Julia A. Walker AA School of Chemistry, Monash University, Clayton, Vic. 3800, Australia.
B School of Pharmacy and Molecular Sciences, James Cook University, Townsville, Qld 4811, Australia.
C Corresponding authors. Email: david.turner@monash.edu; peter.junk@jcu.edu.au
Australian Journal of Chemistry 66(10) 1138-1143 https://doi.org/10.1071/CH13185
Submitted: 18 April 2013 Accepted: 2 May 2013 Published: 12 June 2013
Abstract
Three new zinc 8-quinaldinolate complexes have been obtained from rearrangement reactions at elevated temperatures including the first homoleptic zinc 8-quinaldinolate complex. The homoleptic, trinuclear complex [Zn3(MQ)6] (1) (MQ = 8-quinaldinolate) was obtained by the recrystallisation of amorphous Zn(MQ)2 from a 1,2,4,5-tetramethylbenzene flux at 270°C. The heteroleptic complexes [Zn4Cl4(MQ)4] (2) and [Zn4Cl2(MQ)6] (3) were simultaneously obtained by the reaction between Zn(MQ)2 and anhydrous ZnCl2 under the same conditions. All complexes contain quinaldinolate ligands in a mixed chelating–bridging coordination mode. The homoleptic complex adopts a V-shaped geometry whereas the heteroleptic complexes adopt closely related cyclic structures.
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