Solid-state complexes of quinoxaline- and phenazine-N,N'-dioxide donors with tetracyanoethylene. Crystal engineering via donor-acceptor interactions

Article abstract of DOI:10.1016/S0040-4039(97)10089-2

2,3-Dimethylquinoxaline-N,N'-dioxide (DMQDO) and phenazine-N,N'-dioxide (PDO) bind to tetracyanoethylene (TCNE) in solution, with complexation constants of 4.8(7) and 1.2(7) M^-1, respectively in CH₂Cl₂. Crystallization of the mixtures affords two-component solids which contain weakly bound one-dimensional donor-acceptor arrays. The DA interactions create DA ladder domains in the (DMQDO)₂TCNE solid and single-stranded DA chains in the (PDO)TCNE crystal.