快来大神呀

分析如图

首先这是楼主自己的锅，依莱尔的那么有名的书732-733页不看？？这是热力学平衡和动力学没有半点关系。不知道考虑碱进攻是几个意思.

The main reason for this occurrence seems to be
that the terminal methyl group of ethyl (or one of the terminal methyl groups of
the isopropyl substituent) in the axial conformer is unimpeded when it points
toward the carbonyl function of the cyclohexanone, whereas it is subject to a
butane-gauche interaction in the corresponding axially substituted cyclohexane
(cf. Fig. 11.24). In addition, in the 2-isopropylcyclohexanone there is a destabili-
zation of the equatorial conformer by interaction of one of the terminal methyl
groups with the carbonyl oxygen. The situation with the tert-butyl compound is
more complex, since it appears to exist predominantly in the twist form. The
-AGO values for the halogens are not only diminished from their cyclohexane
values [F, 0.36 kcal mol-' (1.51 kJ mol-'); C1, 0.55 kcal mol-' (2.30 k~ mol-I);
Br, 0.49 kcal mol-' (2.05 kJ mol-'); cf. Table 11.71 but they are also strongly
solvent dependent; in the case of C1 in the low-dielectric solvent heptane, and for
Br in all solvents studied, the axial conformer is actually preferred.
还在椅式构象？？还在直立键平伏键？？？？一口老血，

在碱性条件下，酮式变为烯醇式，使手性中心消失（红色标示相连的碳），然后烯醇式在回到酮式，一般不考虑其他因素的话，会变为消旋体， 但是由于大基团在平伏键上更稳定，所以更倾向于右边的化合物