Class 12 Chemistry Coordination Compounds Introduction


The Coordination compounds are very important in day to day life, many compounds exist as coordination compounds as they have special type of linkage that is coordinate bond .It is formed between electron rich and electron deficient species.

Coordinate bond: It is a bond in which sharing of electrons occurs but not mutual sharing. In this the shared pair is donated by only one atom and the one that donates is donor and the other which accepts is acceptor.

For example:

NH3:  + BF3--à{H3N :-> BF3}

In this NH3 is donor atom as it has lone pair and BF3 is acceptor as it is electron deficient compound.

The branch of chemistry that deals with the study of coordination compounds are called as” coordinate chemistry “

Examples of some coordinate compounds like:

  • Hemoglobin – coordination compound of iron (Fe)
  • Chlorophyll – coordination compound of magnesium (Mg)
  • Vitamin B12- coordination compound of cobalt (Co)

Most of time coordination compounds are confused with double salts but there exists a lot difference between the two.

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