Dimorphism in 4,4,6,6-tetrachloro-2,2-(2,2-dimethylpropane-1,3-dioxy)-cyclotriphosphaz ene and 6,6-dichloro-2,2 : 4,4-bis(2,2-dimethylpropane-1,3-dioxy)cyclotriphosphazene


Coles, S.J., Davies, D.B., Hacivelioglu, F., Hursthouse, M.B., Ibisoglu, H., Kilic, A. and Shaw, R.A. (2007) Dimorphism in 4,4,6,6-tetrachloro-2,2-(2,2-dimethylpropane-1,3-dioxy)-cyclotriphosphaz ene and 6,6-dichloro-2,2 : 4,4-bis(2,2-dimethylpropane-1,3-dioxy)cyclotriphosphazene. Acta Crystallographica Section C-Crystal Structure Communications, 63, (3), O152-O156. (doi:10.1107/S0108270107003046).

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Description/Abstract

A second, polymorphic, form of the previously reported compound 4,4,6,6-tetrachloro-2,2-(2,2-dimethylpropane-1,3-dioxy)cyclotriphosphazene, C5H10Cl4N3O2P3, is now reported. The molecular structures of these two compounds are similar, aside from minor conformational differences. However, the compounds crystallize in two different space groups and exhibit quite different crystal structure assemblies. Additionally, 6,6-dichloro-2,2:4,4-bis(2,2-dimethylpropane-1,3-dioxy)cyclotriphosphazene, C10H20Cl2N3O4P3, is shown to exhibit two different conformational polymorphs when crystallized from different solvent mixtures. The [alpha] form crystallizes in the space group Pnma with the molecular structure lying on a mirror plane (symmetry code: x, -y + {1\over 2}, z), whilst the [beta] form is in the space group C2/c with the molecular structure lying on a twofold axis (symmetry code: -x, y, -z + {3\over 2}). The difference between the two molecular structures is in the conformation of the spiro-ring substituents with respect to the phosphazene ring. The resulting crystal structures give rise to differing packing motifs.

Item Type: Article
ISSNs: 0108-2701 (print)
Related URLs:
Keywords: phosphorus-nitrogen compounds
Subjects: Q Science
Q Science > QD Chemistry
Divisions: University Structure - Pre August 2011 > School of Chemistry
ePrint ID: 54272
Date Deposited: 31 Jul 2008
Last Modified: 27 Mar 2014 18:37
URI: http://eprints.soton.ac.uk/id/eprint/54272

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