Pyrazinedioxide–Tetracyanoethylene Arrays in the Solid State—New Donor–Acceptor Interaction for Crystal Engineering

Authors


  • This research was supported by the United States National Science Foundation (NSF projects CHE-9200144 and CHE-9626144) and by the University of Alabama. We thank L. M. Rogers for assistance with X-ray crystal structures. B. J. M. was supported by the NSF REU program (CHE-9531496).

Abstract

original image

Ladder and web polymorphic forms of cocrystals of tetramethylpyrazinedioxide (TMPDO) and tetracyanoethylene (TCNE) are obtained by rapid or slow crystallization, respectively. In the thermodynamically less stable, purple (TMPDO)2− TCNE crystals the donor and acceptor building blocks are linked through N+O°C(alkene) interactions to form one-dimensional ladders (see picture below).

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