Explain structures of diborane and boric acid.

Answer:

(1) Diborane

Diborane is a chemical compound that consists of boron and hydrogen atoms and has a molecular formula B2H6. The compounds consisting of boron and hydrogen atoms are called boranes. Diborane is one of the simplest boron hydrides.

Structure of diborane

Structure of diborane

 

The boron atom has four hybrid orbitals and is considered to be sp3 hybridised. Three of the orbitals from these four hybrid orbitals have one electron each, and one of them is an empty orbital. The two electrons of the hybrid orbitals in each of the boron atoms form 2 bonds with the 1s hydrogen atoms.

(2) Boric acid

Boric acid is a monobasic Lewis acid of boron with a chemical formula H3BO3. It is an acid-containing four atoms of oxygen, one atom of boron, and three atoms of hydrogen. It is also called as acidum boricum, hydrogen borate, boracic acid, and orthoboric acid.

Structure of boric acid

Structure of boric acid

Boric acid is formed in layers. The Planar BO 3 group is connected by H atoms to another unit. The H atoms form a covalent bond with the BO 3 group and a hydrogen bond with another BO 3 unit.

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