The crystal structures of anhydrous nitrates and their complexes. Part IV. Tin(IV) nitrate
- 1 January 1967
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 1949-1954
- https://doi.org/10.1039/j19670001949
Abstract
The crystal structure of tin(IV) nitrate is isomorphous with that of titanium(IV) nitrate. There are four Sn(NO3)4 molecules in each monoclinic unit cell of dimensions a= 7·80 ± 0·01 Å, b= 13·85 ± 0·01 Å, c= 10·23 ± 0·01 Å, β= 123·6°± 0·2°, and space-group P21/c. The Sn(NO3)4 molecule corresponds closely to D2d symmetry and the nitrato-groups are equivalent, each being symmetrically bidentate to the tin atom. The dimensions of the nitrato-groups differ considerably from those of a typical nitrate ion, having average N–O distances 1·288 ± 0·010 Å for the bonds adjacent to the tin atom and 1·179 ± 0·016 Å for the outer bonds, indicating strong co-ordination of the nitrato-groups to the tin atom. The adoption of the dodecahedral arrangement by the eight oxygen atoms adjacent to the metal atoms in Ti(NO3)4 and Sn(NO3)4 is discussed, and a correlation between the length and stretching frequency of N–O bonds is presented.Keywords
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