Calculate (x + y)/z for given molecular species :
BF₃, B₂H₆, Be₂Cl₄, C₂H₆, Al₂Cl₆, Be₂H₄, Si₂H₆, N₂O₄
where
x = Number of molecules having (2pπ-2pπ) back bond.
y = Number of molecules which are not hypovalent
z = Number of molecules having (3c-2e⁻) bridge bond.

Question

Calculate (x + y)/z for given molecular species :

BF₃, B₂H₆, Be₂Cl₄, C₂H₆, Al₂Cl₆, Be₂H₄, Si₂H₆, N₂O₄

where

x = Number of molecules having (2pπ-2pπ) back bond.

y = Number of molecules which are not hypovalent

z = Number of molecules having (3c-2e⁻) bridge bond.

TestHub · Accepted Answer

x: only BF 3 has 2pπ-2pπ back bonding, x = 1. y: C 2 H 6 , Si 2 H 6 , N 2 O 4 , Al 2 Cl 6 (octets complete by Cl bridges), y = 4. z: B 2 H 6 and Be 2 H 4 , z = 2. (1+4)/2 = 2.50.

Chemistry - CHEMICAL BONDING Question with Solution | TestHub

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