The effects of π-acceptor and π-donor substitution in cross-conjugated enynes

被引:26
作者
Zhao, YM [1 ]
Ciulei, SC [1 ]
Tykwinski, RR [1 ]
机构
[1] Univ Alberta, Dept Chem, Edmonton, AB T6G 2G2, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
enynes; donor/acceptor chromophores; tetrayne; cross conjugation;
D O I
10.1016/S0040-4039(01)01659-8
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Donor (p-NMe2C6H4) and acceptor (p-NO2C6H4) substitution has been appended onto two different cross-conjugated enyne scaffolds and the electronic effects as a function of substitution have been evaluated. Interestingly, the observed electronic effects are quite dependent on the constitution of the enyne framework. In the case of tetraynes 2a-c, acceptor substituted 2b shows an additional low energy absorption in the UV-vis spectrum as compared to 2a and 2c. In contrast, little difference in the electronic characteristics of 4a-b is detected. The X-ray crystallographic analysis of 4a is also described. (C), 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:7721 / 7723
页数:3
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