Answer to Question #142474 in Organic Chemistry for shania

Question

What would be a property of a polar covalent bond ?

Answer 1

Polar covalent bonds are usually formed between two nonmetal atoms having different electronegativities.

Let us consider A and B in which them is electronegativity difference is not equal to zero contains a covalent bond between them. The shared pair of electrons forming a bond between A and B move towards move electronegative B.

Then B gets partial negative charge and attains ‘A’ gets partial positive charge them, with two charges (Poles are formed and it is known as Dipolar molecular or dipole or polar covalent module) as in H – Cl. In this molecule the shared pair of electron moves towards high electronegative chlorine atom. Then H atom gets partial positive charge and Cl atom gets a partial negative charge, hence a dipole is formed.

Properties of Polar Covalent Compounds

• Physical state: These compounds can exist as solids due to greater force of interactions.
• Melting and boiling points: These have greater melting and boiling point than non-polar compounds.
• Conductivity: They conduct electricity in the solution state due to the mobility of ions.
• Solubility: These are highly soluble in polar solvents like water