3.6
[1]. R Herrera, et al. Regio- and stereoselectivity of captodative olefins in 1,3-dipolar cycloadditions. A DFT/HSAB theory rationale for the observed regiochemistry of nitrones. J Org Chem. 001 Feb 3;66(4):15-63.
P61-P64-P71-P80-P30+P35-P304+P340-P36+P364-P405-P501