Which of the following are formed when BCl3 is treated with NH3. (a) B(NH2)3 (b) B2(NH3)2 (c) BN

step 1 Hello students. This question we are asked, what is formed when BCL 3 reacts with NH3? Okay, so

Which of the following are formed when BCl3 is treated with...

Which of the following are formed when $\mathrm{BCl}_{3}$ is treated with $\mathrm{NH}_{3}$.
(a) $\mathrm{B}\left(\mathrm{NH}_{2}\right)_{3}$
(b) $\mathrm{B}_{2}\left(\mathrm{NH}_{3}\right)_{2}$
(c) BN
(d) All of these

Key Concepts

Boron Nitride Formation

Under certain conditions, reactions involving boron compounds and nitrogen sources such as ammonia can lead to the formation of boron nitride (BN), a material noted for its structural similarity to graphite or cubic forms analogous to diamond. Boron nitride is an important inorganic compound with a wide range of applications, and its synthesis often involves elimination or condensation processes during reactions between boron halides and nitrogenous compounds.

Lewis Acid?Base Interactions

Boron trichloride (BCl3) is a classic Lewis acid because it is electron deficient, while ammonia (NH3) acts as a Lewis base due to its lone pair of electrons. When these two species are combined, the electron pair on nitrogen can coordinate to the boron center, leading to the formation of adducts or complexes. This fundamental interaction underlies many reactions in inorganic and coordination chemistry.

Coordination Complex Formation

The reaction between BCl3 and NH3 often leads to the formation of coordination complexes in which ammonia molecules are coordinated to the electron deficient boron atoms. These complexes represent a class of compounds wherein a central atom (in this case, boron) forms coordinate covalent bonds with surrounding ligands like ammonia. The formation of such complexes is a key aspect of transition and main-group chemistry.

Substitution Reactions in Boron Chemistry

When boron halides like BCl3 react with nucleophilic species such as ammonia, substitution reactions can occur where chlorine atoms are replaced by amide or amino groups. This reaction pathway can lead to the formation of boron amides such as B(NH2)3. Substitution reactions are central to understanding the reactivity and synthesis of various boron-containing compounds.

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