Silianol (SiH3OH) is more acidic than methanol (CH3OH) why?

We know that acidic strength of an acid also depend upon stability of its conjugate base. So silianol is more acidic than methanol (H₃C-OH) because conjugate base silianol (H₃Si-OH) stablised by dispersal of negative charge in H₃Si-O- ion by 2pπ—3dπ back bonding

Hence methanol is less acidic than silianol.

For more detail on Back bonding click here

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