Column I (Species)
Column II (Type of back bonding)
(P) (CH₃)₃CO^-
(1) npπ - npπ
(Q) Boron trichloride
(2) npπ - (n+1)pπ
(R) Phosphorous trifluoride
(3) No back bonding
(S) Difluorocarbene (singlet)
(4) npπ - (n+1)dπ

Question

Column I (Species)	Column II (Type of back bonding)
(P) (CH₃)₃CO^-	(1) npπ - npπ
(Q) Boron trichloride	(2) npπ - (n+1)pπ
(R) Phosphorous trifluoride	(3) No back bonding
(S) Difluorocarbene (singlet)	(4) npπ - (n+1)dπ

TestHub · Accepted Answer

(P) The alkoxide O has no empty orbital next to it: no back bonding, 3. (Q) BCl 3 : 3p lone pair of Cl into empty 2p of B, npπ-(n+1)pπ: 2. (R) PF 3 : F lone pair into empty 3d of P: 4. (S) :CF 2 : 2p lone pair of F into empty 2p of C: 1. Answer: (D).

Chemistry - CHEMICAL BONDING Question with Solution | TestHub

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