Issue 63, 2004

Co-crystallization with acetylene. Part III. Molecular complexes with aromatic azacycles

Abstract

Using C–H⋯N interactions, acetylene can be introduced at increased pressure to form molecular complexes with azacyclic N-acceptors which can be crystallized and investigated by X-ray methods. With pyridine, we expected dumbbell-like 2∶1 complexes with acetylene in the middle, instead a 1∶1 zigzag chain is formed where each of the N-atoms accepts two hydrogen atoms from two acetylene molecules. The same happens with 2,5-dimethylpyridine which, together with water, results in a complex having the water chains networked by acetylene molecules. With 2,5-dimethylpyrazine, linear chains are found which are additionally stabilized by sp3 and sp2 C–H⋯N interactions. 2,6-Di-tert-butylpyridine forms a clathrate with acetylene.

Graphical abstract: Co-crystallization with acetylene. Part III. Molecular complexes with aromatic azacycles

Article information

Article type
Paper
Submitted
13 jul 2004
Accepted
16 ago 2004
First published
24 set 2004

CrystEngComm, 2004,6, 361-366

Co-crystallization with acetylene. Part III. Molecular complexes with aromatic azacycles

M. T. Kirchner, R. Boese, A. Gehrke and D. Bläser, CrystEngComm, 2004, 6, 361 DOI: 10.1039/B410636A

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