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Question

$${ BF }_{ 3 }$$ and $${ NH }_ { 3 }$$ undergo a Lewis acid-base reaction forming an adduct. Which picture below currently represents the curved arrow notation for the initial Lewis acid-Lewis base interaction in this reaction, what is the Lewis acid and the Lewis base?

937379_93f1c20218294e2997efe85b662d35a1.png


A
Picture (1) is correct; NH3 is the Lewis acid and BF3 is the Lewis base.
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B
Picture (2) is correct; BF3 is the Lewis acid and NH3 is the Lewis base.
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C
Picture (3) is correct; NH3 is the Lewis acid and BF3 is the Lewis base.
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D
Picture (4) is correct; BF3 is the Lewis acid and NH3 is the Lewis base.
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Solution

The correct option is A Picture (2) is correct; $${ BF }_{ 3 }$$ is the Lewis acid and $${ NH }_{ 3 }$$ is the Lewis base.
Since $$B$$ haas a vacant orbital $$NH_3$$ gives electron to Baron and undergoes a Lewis acid base reactions.
So, $$BF$$ is a Lewis acid and $$NH_3$$ is a Lewis base.

1076972_937379_ans_1e651526763b454db10d3f23281f4059.png

Chemistry
NCERT
Standard XII

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