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

attributive. Designating a type of projection formula used chiefly to depict conformational isomers of an organic compound, in which the arrangement of substituents on two adjacent atoms are viewed along the axis of the bond between the atoms, the nearer atom being represented by a point with the respective orientations of its substituents shown by radiating lines, and the far atom and its substituents being represented by a circle with lines radiating from its edge. Esp. in Newman projection, Newman projection formula.

ΚΠ

1962 E. L. Eliel Stereochem. Carbon Compounds iii. 23 In the Newman projection formula, the molecule is viewed from front to back in the direction of the bond linking the asymmetric carbon atoms.

1985 A. Streitweiser & C. H. Heathcock Introd. Org. Chem. (ed. 3) v. 85 In this structure [sc. the chair conformation of cyclohexane] the bond angles are close to tetrahedral, and all pairs of hydrogens are completely staggered with respect to each other. The latter point can easily be seen by looking down each carbon-carbon bond in turn to produce the Newman projections shown in Figure 5.19.

1992 Jrnl. Org. Chem. 57 237 Twist is defined as the angle between the bisectors of the 1,1- and the 2,2-substituent angles on a Newman diagram (i.e., a projection down the CC bond) of the olefin.

单词	newman projection
释义	> as lemmas Newman projection attributive. Designating a type of projection formula used chiefly to depict conformational isomers of an organic compound, in which the arrangement of substituents on two adjacent atoms are viewed along the axis of the bond between the atoms, the nearer atom being represented by a point with the respective orientations of its substituents shown by radiating lines, and the far atom and its substituents being represented by a circle with lines radiating from its edge. Esp. in Newman projection, Newman projection formula. ΚΠ 1962 E. L. Eliel Stereochem. Carbon Compounds iii. 23 In the Newman projection formula, the molecule is viewed from front to back in the direction of the bond linking the asymmetric carbon atoms. 1985 A. Streitweiser & C. H. Heathcock Introd. Org. Chem. (ed. 3) v. 85 In this structure [sc. the chair conformation of cyclohexane] the bond angles are close to tetrahedral, and all pairs of hydrogens are completely staggered with respect to each other. The latter point can easily be seen by looking down each carbon-carbon bond in turn to produce the Newman projections shown in Figure 5.19. 1992 Jrnl. Org. Chem. 57 237 Twist is defined as the angle between the bisectors of the 1,1- and the 2,2-substituent angles on a Newman diagram (i.e., a projection down the CC bond) of the olefin. extracted from Newmann.² < as lemmas
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> as lemmas