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

共 22 条

[1] SIR97:: a new tool for crystal structure determination and refinement
Altomare, A
Burla, MC
Camalli, M
Cascarano, GL
Giacovazzo, C
Guagliardi, A
Moliterni, AGG
Polidori, G
Spagna, R
[J]. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1999, 32 : 115 - 119
[2] ANG Y, 1998, CHEM COMMUN, P1457
[3] [Anonymous], CALIXARENES 2001
[4] ALKALI-METAL ION COMPLEXES OF THE CALIXARENES .1. CESIUM BONDING IN CALIX[4]ARENE SYSTEMS
ASSMUS, R
BOHMER, V
HARROWFIELD, JM
OGDEN, MI
RICHMOND, WR
SKELTON, BW
WHITE, AH
[J]. JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1993, (16): : 2427 - 2433
[5] CALIXARENES, MACROCYCLES WITH (ALMOST) UNLIMITED POSSIBILITIES
BOHMER, V
[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1995, 34 (07): : 713 - 745
[6] Remarkable alkali cation template effect in 1,5-bridged calix[8]arenes
Consoli, GML
Cunsolo, F
Geraci, C
Neri, P
[J]. ORGANIC LETTERS, 2001, 3 (11) : 1605 - 1608
[7] Cation-pi interactions in chemistry and biology: A new view of benzene, Phe, Tyr, and Trp
Dougherty, DA
[J]. SCIENCE, 1996, 271 (5246) : 163 - 168
[8] FENTON DE, 1987, COMPREHENSIVE COORDI, V3, P1
[9] Cation encapsulation within a ten-oxygen spheroidal cavity of conformationally preorganized 1,5-3,7-calix[8]bis-crown-3 derivatives
Geraci, C
Chessari, G
Piatelli, M
Neri, P
[J]. CHEMICAL COMMUNICATIONS, 1997, (10) : 921 - 922
[10] Interplay between cone and partial-cone geometry in doubly-bridged calix[8]arenes investigated by X-ray and 2D NMR
Geraci, C
Bottino, A
Piattelli, M
Gavuzzo, E
Neri, P
[J]. JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, 2000, (02): : 185 - 187

← 1 2 3 →