Smith Graham, Wermuth Urs D, White Jonathan M
School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia.
Acta Crystallogr C. 2006 Jun;62(Pt 6):o353-7. doi: 10.1107/S0108270106017288. Epub 2006 May 24.
The structures of two brucinium (2,3-dimethoxy-10-oxostrychnidinium) salts of the alpha-hydroxy acids L-malic acid and L-tartaric acid, namely brucinium hydrogen (S)-malate pentahydrate, C23H27N2O4+.C4H5O5-.5H2O, (I), and anhydrous brucinium hydrogen (2R,3R)-tartrate, C23H27N2O4+.C4H5O6-,(II), have been determined at 130 K. Compound (I) has two brucinium cations, two hydrogen malate anions and ten water molecules of solvation in the asymmetric unit, and forms an extensively hydrogen-bonded three-dimensional framework structure. In compound (II), the brucinium cations form the common undulating brucine sheet substructures, which accommodate parallel chains of head-to-tail hydrogen-bonded tartrate anion species in the interstitial cavities.
已在130 K下测定了α-羟基酸L-苹果酸和L-酒石酸的两种马钱子碱（2,3-二甲氧基-10-氧代士的宁鎓）盐的结构，即马钱子碱氢（S）-苹果酸盐五水合物，C23H27N2O4⁺·C4H5O5⁻·5H2O，（I），以及无水马钱子碱氢（2R,3R）-酒石酸盐，C23H27N2O4⁺·C4H5O6⁻，（II）。化合物（I）在不对称单元中有两个马钱子碱阳离子、两个苹果酸氢阴离子和十个溶剂化水分子，并形成了广泛氢键连接的三维骨架结构。在化合物（II）中，马钱子碱阳离子形成常见的起伏状马钱子碱片层亚结构，这些亚结构在间隙空腔中容纳头对头氢键连接的酒石酸根阴离子物种的平行链。
