Formation of a [2]rotaxane and [2]catenane based on PdBr2L2 as a template

被引：4

作者：

Blight, Barry A. ^{[1
]}

Wisner, James A. ^{[1
]}

Jennings, Michael C. ^{[1
]}

机构：

[1] Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada

来源：

CANADIAN JOURNAL OF CHEMISTRY | 2009年 / 87卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

rotaxane; catenane; hydrogen bonding; interlocked; supramolecular chemistry; MECHANICALLY INTERLOCKED MOLECULES; ANION RECOGNITION; CATENANES; RING; COORDINATION; ROTAXANE; DITHIOCARBAMATE; MACROCYCLES; SHUTTLES; PALLADIUM(II);

D O I：

10.1139/V08-126

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Previous studies have determined that neutral palladium(II) dibromide complexes template the formation of [2]pseudorotaxanes, albeit with weaker affinities than the analogous palladium( II) dichloride species. Here, the self-assembly of both [2]rotaxane (2) and [2]catenane (5) were attempted using a PdBr2L2 centre as the template, resulting in the desired interlocked structures. The structures were confirmed by NMR spectroscopy, CSI-MS, and single crystal X-ray diffraction analyses. [2]Rotaxane 2 was isolated in 53% and [ 2] catenane 5 in 41% yields. The lower yields observed in comparison to the chloride analogues can be attributed to the reduced template effect of the palladium( II) dibromide subunits, caused by both the poor steric fit of the bromides in the isophthalamide cleft and bromide's reduced capacity as a hydrogen bond acceptor.

引用

页码：205 / 211

页数：7

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