Which of the following factors is favorable for nucleophilicity but not basicity?

Question

Quizplus · Accepted Answer

Highly polarizable factors allow for the nucleophile to have a larger electron cloud, making it more likely to attack and participate in a reaction. However, this does not necessarily mean that the nucleophile has a strong affinity for accepting a proton, which is the characteristic of basicity. Low electronegativity and negatively charged factors can also enhance nucleophilicity, but they often correlate with basicity as well. Steric hindrance, on the other hand, hinders both nucleophilicity and basicity as it restricts the access of the nucleophile to the electrophilic center.

Which of the Following Factors Is Favorable for Nucleophilicity but Not