1.

Which of the following order regarding the stability of intemediates is not correctly arranged?

Answer»

`F_(2) OVERSET(..)(C) lt Cl_(2) overset(..)(C) gt Br_(2) overset(..)gt I_(2) overset(..)(C)`
`(C_(6) H_(5) )_(3) overset(..)(C) gt (C_(6) H_(5))_(2) overset(.)(CH) gt CH_(2)= CH - overset(.)(CH_(2))`
R - C `equiv bar(C) lt R_(2)C = bar(C) HLT R_(3) C - bar(C) H_(2)`
`(C_(6) H_(5))_(3) overset(+)(C) lt (C_(6) H_(5))_(2) C^(+) gt CH_(2)^(+) - CH = CH_(2)`

Solution :(c) : (a) Due to backbonding, the stability of `CF_(2)` (singlet) is more than the other.
(b) More the number of phenyl group, more is the stability of radical attached to it.
R - C `equiv bar(C) gt R_(2) C = UNDERSET(("electronegativity basis"))(bar(C)H gt R_(3) C - bar(C)H_(2) ) `
(d) `(C_(6) H_(5))_(3) overset(+)(C) gt (C_(6) H_(5))_(2) overset(+)(CH) gt H_(2) C = CH - overset(+)(CH_(2)) `


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