期刊
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE
卷 65, 期 -, 页码 223-229出版社
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1107/S0108768109002134
关键词
-
资金
- NSF [0087210, DBI-0216630]
- Ohio Board of Regents [CAP-491]
The oxime derivative of [1.1.1]cyclophane cyclotriveratrylene (CTV) was ring expanded utilizing a Beckmann rearrangement to provide a ten-membered N-acetyl macrocyclic amide that crystallizes as a chloroform monosolvate in columnar assemblies manifesting an unusual disorder within the crystal. Columns made up of this structure consist of infinite columnar assemblies of alternating d and L enantiomers and therefore necessarily are made up of a racemate, yet the chiralities of individual molecules in adjacent columns are independent of one another, leading to the overall formation of a two-dimensional solid solution. The random arrangement of the columns within the structure leads to the emergence of a crystallographic mirror plane not reflected by the molecular symmetry, to a change of symmetry from Pna2(1) to Pnma and to whole-molecule disorder of the bowl-shaped molecules within the columns.
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