Cocrystals of 2-(2,4,5,7-tetranitrofluoren-9-ylidene)propanedinitrile and 2,4,5,7-tetranitrofluoren-9-one with chlorobenzene.
Crystallization of 2,4,5,7-tetranitro-9-(dicyanomethylene)fluorene [DTeF; systematic name: 2-(2,4,5,7-tetranitrofluorene-9-ylidene)propanedinitrile] and 2,4,5,7-tetranitrofluoren-9-one (TeNF) from chlorobenzene in the presence of pi-donor compounds yielded the chlorobenzene solvate, C(16)H(4)N(6)O(8) x C(6)H(5)Cl, and the bis(chlorobenzene) solvate, C(13)H(4)N(4)O(9) x 2C(6)H(5)Cl, respectively. Both structures comprise mixed stacks of twisted fluorene moieties interspersed with nearly parallel chlorobenzene molecules. Solvent-free crystals of DTeF and TeNF were obtained from pure chlorobenzene.
Batsanov
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Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, England. a.s.batsanov@durham.ac.uk
Perepichka
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IF
Bryce
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MR
Howard
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JA