| 单词 | molecular rotation |
| 释义 | > as lemmasmolecular rotation molecular rotation n. Physical Chemistry (a) rotation of a molecule or part of a molecule; (b) the optical activity of a substance in solution or as a liquid adjusted to allow for the molar concentration or density of the active substance; cf. specific rotation n. at specific adj. and n. Compounds. ΚΠ 1888 A. B. Bassett Treat. Hydrodynamics I. 75 Let P be any point on the axis of one of these [vortex] filaments, dm the mass of the filament which contains P, w and dS the molecular rotation and cross section of the filament. 1906 G. M'Gowan & J. J. Sudborough Bernthsen's Text-bk. Org. Chem. xlvii. 627 The molecular rotation is the product of the specific rotatory power into the molecular weight (M). 1967 E. U. Condon & H. Odishaw Handbk. Physics (ed. 2) vi. 123/1 The molecular rotation is the product of the specific rotation by the molecular weight M of the active material, and therefore it is the rotation divided by the concentration of active material expressed in gram moles per cubic centimeter. 1967 E. U. Condon & H. Odishaw Handbk. Physics (ed. 2) vi. 123/2 For Na D light the molecular rotation is about 1,100 for R1 = methyl and R2 = ethyl, increasing gradually to about 1,400 as R2 moves along the homologous series up to n-decyl. 1991 D. W. H. Rankin et al. Structural Methods Inorg. Chem. (ed. 2) 226 The remaining local modes are torsional. They derive from molecular rotation of CH3X, and can be worked out by representing the local motion by arrows curved round the M-P bonds. < as lemmas |
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