Crystallography and magnetism of 3-(N-tert-butyl-N-aminoxyl)benzoic acid

Baskett M; Lahti PM

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Crystallography and magnetism of 3-(N-tert-butyl-N-aminoxyl)benzoic acid

机译：3-（N-叔丁基-N-氨基二甲苯基）苯甲酸的晶体学和磁性

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3-(N-tert-Butyl-N-aminoxyl)benzoic acid is a stable red solid that crystallizes to form chains of nitroxide to aryl CH contacts, with the pairs of such antiparallet chains joined by complementary carboxylic acid two-point hydrogen bonds. Although it strongly adsorbs to silica gel, it does not show solution phase ESR evidence of discrete triplet state radical pairing. Solid-state magnetic susceptibility studies show antiferromagnetic downturn at lower temperatures, with a change in slope at about 10 K in Curie-Weiss plots. The results suggest either a phase change at low temperatures, or the presence of multiple competing exchange interactions. (c) 2005 Elsevier Ltd. All rights reserved.

机译：3-（N-叔丁基-N-氨基二甲苯基）苯甲酸是稳定的红色固体，其结晶形成与芳基CH接触的氮氧化物链，成对的此类抗链烷链通过互补的羧酸两点氢键连接。尽管它强烈吸附到硅胶上，但没有显示出固相三元态自由基配对的溶液相ESR证据。固态磁化率研究表明，在较低温度下反铁磁低迷，居里-魏斯图中的斜率变化约为10K。结果表明，要么在低温下发生相变，要么存在多种竞争性交换相互作用。（c）2005 Elsevier Ltd.保留所有权利。

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《Polyhedron: The International Journal for Inorganic and Organometallic Chemistry》 |2005年第17期|共8页
作者
Baskett M; Lahti PM;
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正文语种 eng
中图分类化学;
关键词
hydrogen bonding; exchange interaction; tert-butylnitroxides; carboxylic acids; MOLECULE-BASED MAGNETS; HYDROGEN-BONDS; FERROMAGNETIC INTERACTIONS; COORDINATION-COMPLEXES; NITRONYL NITROXIDE; EXCHANGE; RADICALS; 2-TERT-BUTYLAMINOXYLBENZIMIDAZOLE; TRANSITION; CRYSTALS;

机译：氢键;交换相互作用;叔丁基硝基氧化物;羧酸;分子基磁体;氢键;铁磁相互作用;配位络合物;亚硝基氧氮;交换;自由基;2-叔丁基丁二氧基苯甲酸;三氮杂苯;

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Crystallography and magnetism of 3-(N-tert-butyl-N-aminoxyl)benzoic acid

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