http://blog.naver.com/starry09/70017650746 Nucleophilicity and Basicity Factors in Organic Reactions General Principals Recall the definitions of electrophile and nucleophile: Electrophile: An electron deficient atom, ion or molecule that has an affinity for an electron pair, and will bond to a base or nu:. Nucleophile: An atom, ion or molecule that has an electron pair that may be donated in bo..