ALKYLAMMONIUM CATION INTERACTIONS WITH CALIXARENE ANIONS .2. STRUCTURAL CHARACTERIZATION OF A SALT OF 2-3 CATION - CALIXARENE STOICHIOMETRY

被引:42
作者
HARROWFIELD, JM
RICHMOND, WR
SOBOLEV, AN
WHITE, AH
机构
[1] UNIV WESTERN AUSTRALIA,ADV MINERALS & MAT PROC RES INST,NEDLANDS,WA 6009,AUSTRALIA
[2] L KARPOV PHYS CHEM INST,MOSCOW 103064,RUSSIA
来源
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2 | 1994年 / 01期
关键词
D O I
10.1039/p29940000005
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A room temperature single crystal X-ray structure determination on the tetramethylammonium 'salt' of calix[4]arene ([1.1.1.1]metacyclophane-7,14,21,28-tetraol) has revealed an unusual stoichiometry and unusual structure for this compound. Crystals of salt are tetragonal, space group P4/nnc, a = 18.230(4), c = 22.897(6) angstrom, Z = 4 f.u.; the structure was refined to a residual of 0.087 for 1471 'observed' [I > 3sigma(I)] reflections. The solid has the composition LH4.2[NMe4]+[LH3]-.H2O (LH4 = calix[4]arene) and contains the cation, 'C', in two distinct environments, both involving inclusion within the calixarene units but one involving simple inclusion by a single calixarene ('A') and the other encapsulation by a facing pair of symmetry-related calixarene entities ('B'). Interaggregate spacings by lattice water molecules, W, result in the 'A' moieties being stacked up the 4 axis ... WACCAW ... while the 'B' moieties are stacked along the 2 axes in the ab diagonal, ... W'BCBW'.
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页码:5 / 9
页数:5
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