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What are the postulates of VBT and why is sigma bond stronger that pi bond ? What are the postulates of VBT and why is sigma bond stronger that pi bond ?
@ ankit in sigma bond , electron cloud is present close to the nucleaus , so, it is less reactive , more stable and strong . the electron cloud in case of pi bond , is scattered above and below the nuclei , so, it can easily react , hence , less strong as compared to sigma bond . i am enlisting some of the postulates of vbt here 1- the atomic orbitals of two atoms overlap each other to form a bond , greater the overlapping , stronger will be the bond . 2- at the equilibrium , the internuclear distance , the energy touches a minimum , any attempt to bring the nuclei still closer result in sudden increase IN energy . 3- beacuse of orbital overlap electron density increase between the nuclei . 4- the direction of covalent bond , is along the region of overlap of atomic orbital . 5- sigma bond forms due to head on head overlapping along internuclear axis . HOPE IT CLEARS YOUR DOUBT ALL THE BEST ..
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