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Intermolecular Contacts in Compressed alpha-D-Mannose

机译:压缩的α-D-甘露糖中的分子间接触

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摘要

The monotonic compression of alpha-D-mannose differs from the behaviour of all other sugars investigated so far, which all undergo phase transitions at a significantly lower pressure than the 9 GPa achieved in the current study. This exceptional stability of the alpha-D-mannose structure has been connected with the presence of two symmetry-independent molecules, and an increased number of degrees of freedom allowing a better accommodation of strains between hydrogen bonded molecules. The presence of C-H center dot center dot center dot O bonds accompanying the non-H-bonding O center dot center dot center dot O interactions additionally stabilizes the alpha-D-mannose structure.
机译:α-D-甘露糖的单调压缩与迄今为止研究的所有其他糖的行为不同,所有其他糖都经历相变,压力明显低于当前研究中达到的9 GPa。 α-D-甘露糖结构的这种出色的稳定性与两个对称独立分子的存在有关,并且自由度的增加使氢键分子之间的应变更好地适应。伴随非H键O中心点中心点中心点O相互作用的C-H中心点中心点中心点O键的存在还稳定了α-D-甘露糖结构。

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