When an inorganic compound X having 3 c − 2 e − as well as 2 c - 2 e - bonds react with NH 3 gas at a…

When an inorganic compound X having  3 c − 2 e − as well as 2 c - 2 e - bonds react with NH 3 gas at a certain temperature, gives a compound Y, isostructural with benzene. Compound X with ammonia at a high temperature produces a substance Z, then
  1. X is BH 3 , Y is B 2 N 2 H 3 , Z is inorganic Benzene
  2. X is B 2 H 6 , Y is B 3 N 3 H 6 , Z is Boron nitride
  3. X is borax, Y is B 2 O 3 , Z is inorganic Benzene
  4. Reactions insufficient to predict

Solution

This problem is based on preparation of inorganic benzene and structural charactristics of diborane. Student must be familiar with concept of bonding in diborane to solve this problem. Identify the compounds and complete the chemical reaction using information supplied in the question.

B 2 H 6 X + 2NH 3 excess → Δ Low temperature B 2 H 6 ⋅ 2 NH 3 → Δ 473 K B 3 N 3 H 6 borozole Y


Y has structure similar to benzene (inorganic benzene)

B 2 H 6 + NH 3 excess → Δ High temperature BN X boron nitride Z .

Asked in: JEE-TOPICTESTS-CHEMISTRY

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