| 单词 | sterically |
| 释义 | > as lemmasˈsterically ˈsterically adv. by, or as regards, the three-dimensional arrangement of atoms. ΘΚΠ the world > matter > chemistry > chemical structure or stereochemistry > [adverb] stereochemically1890 sterically1918 1918 Jrnl. Chem. Soc. 114 i. 127 If only one group is sterically hindered, then reactions can take place at both tertiary amino-groups. 1959 New Scientist 19 Feb. 399/1 Propylene,..using a Natta catalyst, can be turned into straight chains of polypropylene molecules, with all the arms or side groups projecting in the same direction: that is to say, they are sterically oriented. 1974 G. B. Gill & M. R. Willis Pericyclic Reactions v. 130 The face to face interaction of the two π-systems is the only mode that is geometrically and sterically feasible. < as lemmas |
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