Write an equation for the Lewis acid/Lewis base reaction between boron trifluoride and eac...

Write an equation for the Lewis acid/Lewis base reaction between boron trifluoride and each of the following. Use curved arrows to track the flow of electrons and show formal charges if present.

(a) Fluoride ion

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(b) Dimethyl sulfide [(CH₃)₂S]

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(c) Trimethylamine [(CH₃)₃N]

Sample Solution (a) Fluoride ion has 8 electrons (4 pairs) in its valence shell. It acts as a Lewis base and uses one pair to bond to boron in BF₃.