位阻steric hindrance；steric effec：又称空间位阻。分子内部基团在空间排布造成的相互排斥作用。使分子构型、对称性、反应活性等发生变化。
Some of the products were characterized by 1HNMR. In this paper, we had tested many kind of amines to react with nine arylketones which were sterically hindered, and gained the yield of 40%92%.
本论文中以各种芳香胺为原料,在常温下,通过与九种位阻较大的酮进行反应,最终得到了40%92%的产率。
参考来源 - 三氯化铝/三乙胺催化合成位阻亚胺的研究The size and steric hindrance of substituent of porphyrin is one of the crucial factors to affect the interaction between porphyrins and DNA.
吡啶取代基的大小和空间位阻是影响相互作用方式的关键因素之一。
参考来源 - 氰类和酯类取代基水溶金属卟啉与DNA相互作用的共振拉曼研究·2,447,543篇论文数据，部分数据来源于NoteExpress
对树脂吸附胆酸过程中的选择性和位阻作了讨论。
Based on this, the selectivity and steric hindrance for the adsorption of bile acids are discussed.
综述了位阻型硅烷化试剂的特点、保护原理和应用。
The characteristics, protective principle and application of Sterically hindered silane blocking agents were reviewed.
该催化剂适用于各种脂肪酮、芳香酮、杂环酮和位阻酮。
This approach covers the substrate range of aliphatic, aromatic, heterocyclic and steric hindrance ketones.
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