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Issue 9, 2011
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Supramolecular metathesis: co-former exchange in co-crystals of pyrazine with (R,R)-, (S,S)-, (R,S)- and (S,S/R,R)-tartaric acid

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Abstract

Co-crystals of dextro-(R,R), levo-(S,S), meso-(R,S) and racemic (R,RS,S)-tartaric acid with pyrazine were obtained by manual kneading and slurry experiments; subsequent reactions in the solid state between these co-crystals and the various forms of tartaric acid in the solid state and via slurry show that co-former exchange takes place according to the sequence of stability [(R,S)-ta]2·py > (S,S/R,R)-ta·py > (R,R)-ta·py or (S,S)-ta·py.

Graphical abstract: Supramolecular metathesis: co-former exchange in co-crystals of pyrazine with (R,R)-, (S,S)-, (R,S)- and (S,S/R,R)-tartaric acid

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Publication details

The article was received on 15 Jun 2010, accepted on 16 Sep 2010 and first published on 05 Oct 2010


Article type: Communication
DOI: 10.1039/C0CE00576B
Citation: CrystEngComm, 2011,13, 3122-3124
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    Supramolecular metathesis: co-former exchange in co-crystals of pyrazine with (R,R)-, (S,S)-, (R,S)- and (S,S/R,R)-tartaric acid

    D. Braga, F. Grepioni and G. I. Lampronti, CrystEngComm, 2011, 13, 3122
    DOI: 10.1039/C0CE00576B

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