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Chapter 6: Q. 5 P (page 159)

An electrostatic potential map of boron trifluoride is shown. Is BF3likely to be a nucleophile or an electrophile? Draw a Lewis structure for BF3, and explain your answer.

Short Answer

Expert verified

BF3acts as an electrophile.

Step by step solution

01

Electrophiles and nucleophiles

Electrophiles are positively charged species that attack the electron-rich center.

For example, BF3, H3O+, and AlCl3

Nucleophiles are the electron-rich centers or negatively charged species that attack electron-deficient centers.

Neutral molecules containing lone pair of an electron can also act as a nucleophile. For example, Cl-, I-, NH3, etc.

02

BF3 as an electrophile

In BF3, boron has three electron couples with three electrons of fluorine. So in BF3, boron has six electrons in its outer shell which indicates that the octet is not complete. Since BF3has a vacant p-orbital, BF3can accept electrons in its vacant p-orbital. Therefore BF3 act as an electrophile.

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