Uranyl oxalate complexes. Part III. Preparation and crystal and molecular structure of ammonium diuranyl trioxalate
- 1 January 1973
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 16,p. 1616-1620
- https://doi.org/10.1039/dt9730001616
Abstract
The crystal structure of the title compound has been determined from photographic and diffractometer data by the heavy-atom method. Crystals are monoclinic, space group P21/n, a= 9·46(2), b= 13·61(2), c= 6·12(1)Å, β= 92·7(1)°, Z= 2. 886 Reflections were refined to a final R of 0·113. The crystal contains NH4 + and [(UO2)2(C2O4)3]n 2n– ions. In the latter, one oxalate group is ter- and one quadri-dentate, giving double chains parallel to c. Mean U–O distances are 1·77 (uranyl) and 2·38 Å(to oxalate). The structures and bonding of oxalato- and other complexes of UO2 + are discussed.Keywords
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