Hydrated Lanthanoid Complexes of 5-(2′-Pyridyl)tetrazole Formed in the Presence of Dimethyl Sulfoxide*
Daniel D'Alessio A , Louise E. Karagiannidis A B , Brian W. Skelton C , Massimiliano Massi A and Mark I. Ogden A D
+ Author Affiliations
- Author Affiliations
A Department of Chemistry, Curtin University, GPO Box U 1987, Perth, WA 6845, Australia.
B Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
C Centre for Microscopy, Characterisation and Analysis, M313, University of Western Australia, Perth, WA 6009, Australia.
D Corresponding author. Email: m.ogden@curtin.edu.au
Australian Journal of Chemistry 65(7) 819-822 https://doi.org/10.1071/CH12031
Submitted: 19 January 2012 Accepted: 18 February 2012 Published: 2 April 2012
Abstract
Reaction of DMSO solvates of lanthanoid nitrates or perchlorates with 5-(2′-pyridyl)tetrazole (pytz) and triethylamine in organic solvents resulted in the unexpected crystallization of hydrates, rather than DMSO solvates. This was confirmed by the structural characterization of [Eu(pytz)3(H2O)3]. Decreasing the metal:ligand ratio in the reaction mixture resulted in the crystallization of a complex salt formulated as [Y(pytz)2(H2O)4](pytz)·(Hpytz)·4H2O; once again DMSO was absent from the product. Interestingly, the omission of base from one reaction resulted in the serendipitous crystallization of Hpytz in a zwitterionic form, unlike the neutral ligand structure reported previously.
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