英语词汇“chair conformation”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

Chemistry and Biochemistry. A conformation of a non-planar six-membered ring in an organic molecule (in the simplest form, cyclohexane) in which two atoms at opposite positions in the ring are offset on opposite sides of the plane formed by the other four atoms. Frequently attributive, as chair conformation, chair form, etc. Contrasted with boat.

ΚΠ

1925 Jrnl. Soc. Chem. Industry 44 606/1 Sachse's two strain-free configurations of cyclohexane... If Mohr's postulate held,..the boat form has a strain free motion and the chair form is rigid.

1959 Science 25 Sept. 793/3 A system is presented for designating, with symbols, all chair and boat conformations of all pyranoid sugars and derivatives.

1977 J. March Adv. Org. Chem. (ed. 2) xviii. 1046 3,4-dimethyl-1,5-hexadiene is free to assume either the chair or boat (it prefers the chair), but other compounds are not so free.

2006 J. M. Hornback Org. Chem. (Internat. Student ed.) vi. 196 There are two nonplanar conformations, called the chair conformation and the boat conformation, that are completely free of angle strain.

单词	chair conformation
释义	> as lemmas chair conformation Chemistry and Biochemistry. A conformation of a non-planar six-membered ring in an organic molecule (in the simplest form, cyclohexane) in which two atoms at opposite positions in the ring are offset on opposite sides of the plane formed by the other four atoms. Frequently attributive, as chair conformation, chair form, etc. Contrasted with boat. ΚΠ 1925 Jrnl. Soc. Chem. Industry 44 606/1 Sachse's two strain-free configurations of cyclohexane... If Mohr's postulate held,..the boat form has a strain free motion and the chair form is rigid. 1959 Science 25 Sept. 793/3 A system is presented for designating, with symbols, all chair and boat conformations of all pyranoid sugars and derivatives. 1977 J. March Adv. Org. Chem. (ed. 2) xviii. 1046 3,4-dimethyl-1,5-hexadiene is free to assume either the chair or boat (it prefers the chair), but other compounds are not so free. 2006 J. M. Hornback Org. Chem. (Internat. Student ed.) vi. 196 There are two nonplanar conformations, called the chair conformation and the boat conformation, that are completely free of angle strain. extracted from chairn.¹ < as lemmas
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> as lemmas