期刊
CARBOHYDRATE RESEARCH
卷 343, 期 14, 页码 2433-2438出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carres.2008.06.014
关键词
inclusion complex; heptakis(2,6-di-O-methyl)cyclomaltoheptaose; parabens; crystal structure
资金
- NRF (Pretoria)
- University of Cape Town
The structures of the inclusion complexes formed by heptakis(2,6-di-O-methyl)cyclomaltoheptaose and methyl-, ethyl-, propyl- and butyl parabens have been solved and analysed by X-ray diffraction. Each inclusion complex crystallises in the space group P2(1)2(1)2(1) with Z = 4 and a host-to-guest ratio of 1:1. However the packing arrangements and modes of guest inclusion are not equivalent for the four structures. The analytical data indicated that two isostructural pairs, the methyl- and ethyl-paraben complexes, have similar cell parameters that differ from those of the propyl- and butyl paraben complexes. The results of thermogravimetric analysis and differential scanning calorimetry of the complexes are also reported. (C) 2008 Elsevier Ltd. All rights reserved.
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