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31 May 2011 23:12:39 IST

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What is back bonding ?

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What is back bonding ?

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Vikram Saxena

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31 May 2011 23:16:33 IST

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Back-bonding takes place b/w two atoms [already forming bond(s)]:

:one wid extra electrons(lone pair) while the other wid empty orbital ( usually d-orbital)....

It just enhances the strength of the bond b/w the two atoms and make the cmpnd more stable as the electrons are shared in empty orbitals!!

ex: Cl in many cmpnds is involved in b-b

This also helps in the formation of cmpnds like CO...

In the C=O C is still having a scarcity of two electrons but O cant form more bonds as its orbitals are filled.....

In this case O donates its lone pair directly to the C forming a back bond wid it and satisfying the C- scarcity...!!!

the back bonding also takes place b/w some metal and ligands wid the same style where the metals are wid lone pairsand the ligand wid empty orbital..!!

ex: CO - Metal and Cl containing ligand-Metal

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