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Question
Statement 1: Trimethyl amine is more basic than trisilyl amine.
Statement 2: Silicon in trisilyl amine is more electronegative than carbon of trimethyl amine.
Statement 1: Trimethyl amine is more basic than trisilyl amine.
Statement 2: Silicon in trisilyl amine is more electronegative than carbon of trimethyl amine.
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Solution
The correct option is D Statement 1 is true, Statement 2 is False
Silicon is more electropositive than carbon. Hence, the statement 2 is false. The lone pair on nitrogen in trimethyl amine can be easily donated. However, in case of trisilyl anion, the lone pair is involved in the formation of pπ−dπ bond. Hence, it cannot be easily donated. Due to this reason, trisilyl amine is less basic than trimethyl amine. Hence, the statement 1 is true.
Silicon is more electropositive than carbon. Hence, the statement 2 is false. The lone pair on nitrogen in trimethyl amine can be easily donated. However, in case of trisilyl anion, the lone pair is involved in the formation of pπ−dπ bond. Hence, it cannot be easily donated. Due to this reason, trisilyl amine is less basic than trimethyl amine. Hence, the statement 1 is true.
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