A multifunctional high-spin biradical pyrazolylbipyridine-bisnitronylnitroxide

被引：35

作者：

Zoppellaro, G ^{[1
]}

Enkelmann, V ^{[1
]}

Geies, A ^{[1
]}

Baumgarten, M ^{[1
]}

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

来源：

ORGANIC LETTERS | 2004年 / 6卷 / 26期

关键词：

D O I：

10.1021/ol0479040

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Synthesis and UV-vis, IR, and EPR spectroscopic characterizations, together with X-ray structural analysis, of functional nitronyl- and iminonitroxides attached to pyrazolylbipyridine are described. The exchange interactions between the nitronylnitroxides are found to be stronger than for the iminonitroxides. Although the substitution of a pyridine with the pyrazole ring leads to shorter distances and larger dipolar couplings, the exchange interaction is diminished. While compound 1 forms dimers in the solid state, the terpyridine 3 leads to supramolecular-pi-stacking.

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页码：4929 / 4932

页数：4

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