Coordinate Covalent Bond

by • 22/08/2013 • GeneralComments (0)487

Coordinate Covalent Bond

A covalent bond in which the shared pair of electrons are donated by only one atom and other one only use it is called “Coordinate covalent bond”.

Explanation:

A covalent bond in which the orbital of any atom with lone pair overlaps with orbital of any other atom with no electrons, is said to be co-ordinate covalent bond. Some elements of group VA, VIA and VIIA have lone pairs when present in a stable molecule and thus we that lone pair for sharing with any atom with no electrons and therefore co-Ordinate bonds are formed.

Examples:

i. Formation of Ammonium Ion:

In ammonium ion which is formed by combination of NH3 and H+, Nitrogen atom present in ammonia have a lone pair. This lone pair is share with H+ ion having no electron; therefore, coordinate covalent bond is formed as;

 

The atom which donates electrons is called donar while the atom which accept electron is called Acceptor.

Co-ordinate bond is denoted by (–>).

ii. Formation of Hypronium ion

 

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