-
4
-
-
84917993080
-
-
4d are prime examples of this evidence.
-
-
-
-
15
-
-
0003978131
-
-
4, the epimeric carbinols would have been formed in the same ratio. Thus it is seen that for the determination of percent stereoselectivity it is unnecessary to work with optically active material …”;
-
(1971)
Asymmetric Organic Reactions
, pp. 85-86
-
-
Morrison1
Mosher2
-
16
-
-
0003971643
-
-
McGraw-Hill, New York, in discussing the epimerization of (−) menthone concludes: “Since (±) menthone is a mixture of equal parts of (−) menthone and (+) menthone and (±) isomenthone is a mixture of equal parts of (+) isomenthone and (−) isomenthone and equilibrium of (±) menthone and (±) isomenthone is the same as that of their pure isomers”. Neither author explicitly states that ideal behaviour is a necessary condition for these statements to be true, although Eliel (idem. Ibid., p. 32, footnote) assumes ideal behaviour when discussing the entropy of mixing.
-
(1962)
Stereochemistry of Carbon Compounds
, pp. 39-40
-
-
Eliel1
-
19
-
-
84917993079
-
-
Depending upon the type of reaction under consideratin, one or more products may be formed the number depending both on the reaction and on whether racemic material or one enantiomer is used as starting material. We will restrict this first discussion to the influence of the chiral reactants upon another, fully aware that the differences in number and kind of products formed may further influence a quantitative treatment of the enantiomeric interaction effect discussed in this paper.
-
-
-
-
20
-
-
84917993077
-
-
7.
-
-
-
-
21
-
-
84917993076
-
-
We predict for example that the ratio of α- and β-epimers resulting from the epimerization (mutorotation) of d-glucose will be different from the ratio when dl-glucose is allowed to epimerize. This experiment has—to our knowledge—not been carried out.
-
-
-
-
25
-
-
0001316257
-
-
The reduction of R,S-camphor and R-camphor were run 9 times under identical conditions.The crude product was carefully excluded from any fractionating work-up and examined by GLC analysis (6 ft. 10% Carbowax, 20 M). The product ratio was determined by accurate integration of peak areas; reproducible results were found as shown in Scheme 3 with an error of < 1%.
-
(1965)
J. Am. Chem. Soc.
, vol.87
, pp. 5620
-
-
Brown1
Deck2
-
26
-
-
84917970435
-
-
Jacques et al. discuss the well-documented difference in the solid phases of conglomerates, racemic crystals and crystals consisting of one enantiomer only
-
(1976)
Tetrahedron
, vol.32
, pp. 321
-
-
Leclerq1
Collet2
Jacques3
-
27
-
-
0040958184
-
-
Weissman et al. showed that electron transfer of optically active hexahelicene anion to optically active hexahelicene goes four times faster between molecules of like configuration than between molecules of opposite configuration.
-
(1967)
J. Am. Chem. Soc.
, vol.89
, pp. 5968
-
-
Chang1
Weissman2
-
28
-
-
84917993075
-
-
We thank the Netherlands Organization for Pure Research (Z.W.O.) for a graduate fellowship.
-
-
-
-
31
-
-
0141440335
-
Fortsch. Chem. Forschung
-
summarize the data on physical effects in chiral molecules and calculate short and long range interaction terms.
-
(1976)
Fortsch. Chem. Forschung
, vol.63
, pp. 1
-
-
Craig1
Mellor2
|
