The correct increasing order of trans-effect of the following species is
(1) NH₃ > CN⁻ > Br⁻ > C₆H₅⁻
(2) CN⁻> C₆H₅ > Br⁻ > NH₃
(3) Br⁻ > CN⁻ > NH₃ > C₆H₅⁻
(4) CN⁻ > Br⁻ > C₆H₅⁻ > NH₃
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Option 3 will be the answer. think so
May it will help you
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