STUDIES OF STABLE FREE RADICALS .20. NITRONYL NITROXIDE MONORADICALS AND BIRADICALS AS POSSIBLE SMALL MOLECULE SPIN LABELS
STUDIES OF STABLE FREE RADICALS .20. NITRONYL NITROXIDE MONORADICALS AND BIRADICALS AS POSSIBLE SMALL MOLECULE SPIN LABELS
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DOI：
10.1021/ja00775a031
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发表时间：
1972-01-01
影响因子：
15
通讯作者：
DARCY, R
中科院分区：
文献类型：
--
作者：
ULLMAN, EF;OSIECKI, JH;DARCY, R
介绍了硝酰基氮氧化物（一种用途广泛的新型稳定自由基）的制备、化学和光谱。这些化合物很容易由大多数醛制备。它们的esr谱可用于测定只有少量醛存在时醛的取代程度。卤代烷基硝酰基氮氧自由基与胺的反应容易进行，所产生的氨基自由基的esr谱可用于区分伯胺和仲胺。共轭和非共轭的双自由基已经制备。零场分裂的数据表明，共轭双自由基存在于几种可能的平面构象。
The preparation, chemistry, andspectra of nitronyl nitroxides, a versatile new class of stable radicals, are described. The compounds are readily prepared from most aldehydes. Their esr spectra may have use in de-termining the extent of a substitution of the aldehyde where only small amounts of the aldehyde are available. Re-action of-haloalkyl nitronyl nitroxides with amines proceeds readily, and the esr spectra of the resulting amino radicals may serve to distinguish between primary andsecondary amines. Both conjugated and unconjugated bi-radicals have been prepared. The zero-field splitting data suggest that the conjugated biradicals exist in several possible planar conformations.