Question

(20) 7. Which reaction of the following pairs will take place more rapidly? a) CH, CH, CH, Br + CH, OH - CH, CH, CH, Br + CH20- b) CH, Br + CH, OH - CH, Br + CH, SH - c) (CH3)2CHCHCI (CH3)2 CHCH,I + Ng + Nz - - CH, Br + (CH3)3N CH, Br + (CH3)3P - (Polar Protic Solvents) e) CH, I + OH- - CHỞI + CH4, CD,

Answer 1

ay Here сле су сну, сня Br + сное at more faster nucleophilic t than than other one, as ovailibility снасн, сно-сі 2trig CHool is more saster eophilic than chaolt due to mare antaiblity of lone Pairs of eo in case of cH₃oo. Here CH₂ SH is more nucleophilic than CHzoll due of less electronegativity of -s-than-o- So here CH₂ Br +CHASH CH₂-S-Ciller is more faster reaction than other c) [cly] Hell; tel +NO (CH₃), CHCH₂ It No (CH₃)₂ CH CH₂ Nz+Lis more tasten reaction than other one as here -I is a batter teaving group than -a. H3 dy Here CH₂ B + (CH₃)3P CH₂-P-CH3 is mare faster reaction i dita +BO than other in polar protic Solvent due to less electronegativity of 'P' atom than n' e) CH₂I + OH- CH₂OH + I is mare faster reaction than other one due to mare nucleophilicity of ot than CH₂ CO2 as in case of CH₂ CO2 eo is not much aviat availablity to nucleophilic attack due to Conjugation of following type. - CH₂ CH₂ o but no such conjugar tion takes place in case of oHo.