LIGHT-INDUCED DETONANT MATERIALS - CHARGE-TRANSFER COMPLEXES OF TETRATHIAFULVALENE (TTF) WITH HEXANITROSTILBENE (HNS) AND TETRAAZIDOQUINONE(TAZQ) AND THEIR ASSOCIATED C-H-CENTER-DOT-CENTER-DOT-CENTER-DOT-O HYDROGEN-BONDED NETWORKS

Charge-transfer complexes of tetrathiafulvalene (TTF) with the electro n-poor hexanitrostilbene (HNS) or tetraazidoquinone (TAZQ) have been i solated as single crystals in a 1:1 stoichiometry and their structures determined by single-crystal X-ray diffraction. TTF . TAZQ crystallis es in the monoclinic system, space group P2(1)/n with a = 8.295(1), b = 14.984(2), c = 14.984(2) Angstrom, beta = 96.26(1)degrees, and TTF . HNS crystallises in the monoclinic system, space group P2(1) with a = 9.193(1), b = 7.428(2), c = 18.350(2), beta = 94.507(9)degrees. In bo th compounds mixed stacks of alternating donor and acceptor molecules are identified in the b direction, together with a complex network of C-H ... X (X = O, N) hydrogen-bond interactions. In TTF . TAZQ, bonds between a TTF hydrogen atom and the quinoid oxygen atom of TAZQ lead t o the formation of DADA chains in the a + b and a - b directions, furt her crosslinked in the c direction through a C-H ... N interaction. In TTF . HNS, infinite helices of alternating TTF and HNS moieties devel op around the 2, axis along b. These helices are further interconnecte d through a C-H ... O hydrogen bond between two neighbouring HNS molec ules in the a direction, giving rise to layers of parallel helices in the ab plane. Optical as well as preliminary light-induced detonant pr operties are reported.