A chiral 2-D donor-acceptor array of a bipyrazine N-oxide and tetracyanoethylene
[formula: see text] Hexamethylbipyrazine-N,N',N",N"'-tetraoxide (1) is synthesized in racemic form and cocrystallized with tetracyanoethylene to give a donor-acceptor (DA) networked lattice. The resulting DA2 cocrystal contains homochiral 2-D DA arrays (layers) cohered by 2.7 A NO...C=C DA bonds with periplanar O p-orbital/C=C orientations. Layer formation is stereoselective, while interlayer relations yield a racemic lattice.
McGee
BJ
Department of Chemistry, University of Alabama, Tuscaloosa 35487, USA.
Sherwood
LJ
Greer
ML
Blackstock
SC