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．
The patterns of 1H and 13 C chemical shifts in acetylenic compounds (Including acylic、alicylic、conjugative、aromatic and heterocyclic compounds) were systematically discussed. The π-electron circulation model is not reliable. The deformation and variation of density of electron clouds around nuclei is a reasonable model.
出处
《波谱学杂志》
CAS
CSCD
北大核心
1998年第6期533-538,共6页
Chinese Journal of Magnetic Resonance
关键词
核磁共振
化学位移
炔类化合物
苯炔
芳环炔
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
