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| 炔氢和炔碳化学位移的本质 | |
| 引用本文： | 李临生.炔氢和炔碳化学位移的本质[J].波谱学杂志,1998,15(6):533-538. |
| 作者姓名： | 李临生 |
| 作者单位： | 西北轻工业学院应用化学研究所, 咸阳 712081 |
| 摘 要： | 系统分析了脂肪族、脂环族、共轭和芳香的以及杂环炔类化合物中的炔键对相连质子和碳原子以及炔碳和相关自旋核的化学位移的影响,结果表明,目前化学位移理论中所采用的炔键在磁场中产生垂直于键轴的环流模型与实验结果有严重矛盾.采用三键的去屏蔽作用、SP杂化和核周电子云变形模型则可对实验事实得到较合理的说明. |
| 关 键 词： | 核磁共振 化学位移 环流 叁键 炔类化合物 环炔 苯炔 芳环炔 氰基 核周电子云变形模型 |
| 收稿时间： | 1998-05-11 |
THE NATURE OF THE CHEMICAL SHIFTS OF ACETYLENIC PROTONS AND CARBONS |
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| Li Linsheng.THE NATURE OF THE CHEMICAL SHIFTS OF ACETYLENIC PROTONS AND CARBONS[J].Chinese Journal of Magnetic Resonance,1998,15(6):533-538. | |
| Authors: | Li Linsheng |
| Institution: | Institute of Applied Chemistry, Nothwest Institute of Light Industry, Xianyang 712081 |
| Abstract: | The patterns of 1H and 13C chemical shifts in acetylenic compounds (Including acylic、alicylic、conjugative、aromatic and heterocyclic compounds) were system atically discussed.The π-electron circulation model is not reliable.The deformation and variation of density of electron clouds around nuclei is a reasonable model. |
| Keywords: | Chemical shifts 1H NMR 13 C NMR Acetylenic bond Acetylenic compound Cycloalkyne Marcrocycloalkyne Benzyne Cyano group Acylium ion deformation of electron clouds around nuclei Circulation model |
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