BCl_(3) does not exist as dimer but BH_(3) exist as dimer (B_(2)H_(6 ) – InterviewSolution

1.	BCl_(3) does not exist as dimer but BH_(3) exist as dimer (B_(2)H_(6 )) because :-
Answer» <P>Chlorine is more electronegative than hydrogen There is `p PI-p pi` back bonding in `BCl_(3)`but `BH_(3)` does not contain such bonding Large sized chlorine atoms do not fit between the small boron atoms WHEREAS small sized hydrogen atoms get FITTED between boron atoms. None of these Answer :C

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