Question

!!! If each compound undergoes electrophilic aromatic substitution, where should the substituent be added?

*The choices for each are either ortho/para position OR meta position.*

Phenol?

Benzaldehyde?

Benzoic Acid?

Bromobenzene?

Nitrobenzene?

Toluene?

Answer 1

Ans The ooup which shows ++R efFect which inere oa ses the electron density eut ortho and para position fn benzene ing therefore, these qroup dre ealled as ortholpama disecting ersoupS The ooups which shows -J|-R effect which inorea ses electron dlensity at meta postion in benzene ving therefore these group ere called as meta drectng gups 0.phenol shows -+p effect 9나 -0 But +R effect is dominamt over-J efFect A there fore: in phenol substituent CDill be add at ortha or para poshion

Bend Benzaldehtde The carbony on benzen ing shodsI1-ReFFect there Pore i is cedthepesel meta-dreching oup Benzaldehyde prefere to a show electrophilic substitution at meta positton i) Bemzofc acid the acidrc 950up on bem2ene shs -R offect Benzoic acid prefer to show electrophilc subs titatfon at peta pasittop Momobenzene - The Bromine on benzeneing Shows -+R effect but here +R dominamt over-Itherefore 1+ is stho lpaoa direchng roup bemzene prefer to show electsophihe substitutioo at ortholpare posthron

Nitobenzenes dThe Nitro qs0ap on bemzene shows -R eFfect No2 Nidro bemeene prefer te shou electrophilre substitution at meta pasition wi Tolune JO The methy Shows on benzen-e per conjugaton e ffeet dnd inerease electron density at antho dnd para positton therePor metheyl roap is rtho pare drecting oap Talume preFer to shoo electsophilrc substitution at ortholpar position

Ans