title: Cocrystals of 2-(2,4,5,7-tetranitrofluoren-9-ylidene)propanedinitrile and 2,4,5,7-tetranitrofluoren-9-one with chlorobenzene.
abstract: 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.
authors.affiliation: Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, England. a.s.batsanov@durham.ac.uk
authors.forename: A S
authors.initials: AS
authors.lastname: Batsanov
authors.forename: I F
authors.initials: IF
authors.lastname: Perepichka
authors.forename: M R
authors.initials: MR
authors.lastname: Bryce
authors.forename: J A
authors.initials: JA
authors.lastname: Howard