Alkenes HOMO values, table

This reaction is therefore dipole-HO-controlled, and we can turn to the coefficients , the (eft)2 values, for the HOMO of the dipole from Table 6.1 and the coefficients of the LUMO of the dipolarophile from Fig. 6.22. Regioselectivity follows in the usual way from the large-large/small-small interaction 6.223, which has the carbon end of the dipole bonding to the ft carbon of the Z-substituted alkene, as observed. 

These principles can be illustrated by reaction of nitrile ylid 434 350 jth ethene, methyl acrylate, and methyl vinyl ether in Figure 11.22330 (all HOMO and LUMO values and coefficients are from Table 11.1). The AE values from Figure 11.22 suggest that nitrile ylids should react fastest with electron-deficient alkenes... 

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