Alkali cation 'conformational templation' in 1,5-bridged calix[8]arenes: a single crystal X-ray proof

被引：19

作者：

Consoli, GML

Cunsolo, F

Geraci, C

Gavuzzo, E

Neri, P

机构：

[1] Univ Salerno, Dipartimento Chim, I-84081 Baronissi, SA, Italy

[2] CNR, Ist Studio Sostanze Nat Interesse Alimentare & Ch, I-95028 Valverde, CT, Italy

[3] CNR, Ist Strutturist Chim G Giacomello, Area Ric Roma, Montelibretti, RM, Italy

来源：

TETRAHEDRON LETTERS | 2002年 / 43卷 / 07期

关键词：

calixarenes; bridged calix[8]arenes; alkali cations; template effect; conformation; X-ray crystal structure;

D O I：

10.1016/S0040-4039(01)02364-4

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

X-Ray crystallography proves that alkali cations can act as conformational templates for 1.5-bridged calix[8]arenes 1H(6), 3H(6), folding their skeleton in a 'tub-shaped' conformation composed of four 3/4-cone clefts. This templation occurs even for neutral 1H(6) to give a (1H(6)Cs)(+).Cl- complex, where Cs+ was found perfectly fitting inside the eight calix[8]arene oxygens cavity. Conventional 'electrostatic' coordination with O atoms occurs whereas cation-pi interactions can be excluded. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1209 / 1211

页数：3