Why is the nitro group a meta director?
Resonating structure of nitrobenzene shows +ve charge develops in ortho and para positions. As a result, the electron density at meta position is relatively higher than at the ortho and para position. Hence, nitro group is meta directing in electrophilic aromatic substitution reaction.
What are meta directors?
Meta director: In electrophilic aromatic substitution, a substituent that favors electrophilic attack meta to the substituent. Most meta directors are also deactivators. Bromination of nitrobenzene gives meta-bromonitrobenzene as the major product because the nitro group is a meta director. aq.
Why is nitrobenzene nitrate used in meta position?
Because of the resonance effect, the nitro group (-NO2) withdraws electrons from the benzene ring and thus decreases electron density more at ortho and para position so that incoming electrophiles attack at electron rich meta position and is thus called meta director.
Which of the following is ortho and para directing group?
−OH group is ortho and para directing due to resonance the electron density is more on ortho and para positions.
What is meta para and ortho?
Updated October 02, 2019. The terms ortho, meta, and para are prefixes used in organic chemistry to indicate the position of non-hydrogen substituents on a hydrocarbon ring (benzene derivative). The prefixes derive from Greek words meaning correct/straight, following/after, and similar, respectively.
What is an ortho para director?
Ortho/para director: In electrophilic aromatic substitution, a substituent that favors electrophilic attack ortho or para to the substituent. Most ortho/para directors are also activators, except for the halogens, which are deactivators.
What is ortho meta and para?
The terms ortho, meta, and para are prefixes used in organic chemistry to indicate the position of non-hydrogen substituents on a hydrocarbon ring (benzene derivative). The prefixes derive from Greek words meaning correct/straight, following/after, and similar, respectively.
What are ortho meta and para positions?
Why is the nitro group a meta director quizlet?
Why is the nitro group a meta director? Because it removes more electron density from the ortho and para positions than the meta position, thus deactivating the meta position less.
What are ortho para and meta directing groups?
Ortho, para directing groups are electron-donating groups; meta directing groups are electron-withdrawing groups. The halide ions, which are electron-withdrawing but ortho, para directing, are the exception.
Which among the following is meta directing group?
NO2 group is the electron withdrawing group due to which electron density in the ring decreases. Therefore meta positions are preferred over ortho / para positions.
Is the nitro group A meta directing group?
Thus, the nitro group is a meta directing group. Ortho, para directing groups are electron-donating groups; meta directing groups are electron-withdrawing groups. The halide ions, which are electron-withdrawing but ortho, para directing, are the exception.
Which is an ortho, para directing group or meta directing group?
Ortho, para directing groups are electron-donating groups; meta directing groups are electron-withdrawing groups. The halide ions, which are electron-withdrawing but ortho, para directing, are the exception. Common ortho, para directing groups:
Which is an ortho, para directing group in benzene?
A = any substituent E + = electrophile If the relative yield of the ortho product and that of the para product are higher than that of the meta product, the substituent on the benzene ring in the monosubstituted benzene is called an ortho, para directing group. If the opposite is observed, the substituent is called a meta directing group.
Is the ortho, para directing group an electron donating group?
Ortho, para directing groups are electron-donating groups; meta directing groups are electron-withdrawing groups. The halide ions, which are electron-withdrawing but ortho, para directing, are the exception.