Does OCH3 have a -I or -R Effect?
However, the -I effect in -OCH3 is countered by the strong +R effect in many situations. Which is more acidic, NO2 or CL? Cl .
Is OCH3 an activating or deactivating group?
Beside this, is och3 activating or deactivating? Any group with decreases the rate (relative to H) is called adeactivating group. Common activating groups (not a complete list): Alkyl, NH2, NR2, OH, OCH3, SR. Common deactivating groups (not a complete list): NO2, CF3, CN, halogens, COOH, SO3H. Beside above, which is more activating OH or och3?
What is the effect of OCH3 EWG on side chain?
It can cause a M+ (mesmeric effect) on the side chain, although oxygen, itself very electronegative, also exerts an I- (inductive effect). Is och3 EWG or EDG?
What is the difference between CH3 and OCH3?
Asalamu alikum to all.. Both CH3 and OCH3 are elecron releasing groups , CH3 releases electron through Inductive effect/Hyperconjugation (shows +I effect) and --OCH3 releases electrons through resonance i.e_ it shows +R effect..
Is OCH3 plus or minus I?
−OCH3 group has weaker +R group than −OH. In −OH group lone pair of Oxygen are easily available which in −OCH3 group, the path is hindered due to CH3 group or it can be the +I effect of CH3 group on oxygen atom that is little unstable than −OH group.
Is OCH3 a +i group?
Which shows more +I effect CH3 or OCH3? In these two groups, -CH3 gives a +I effect whereas -OCH3 gives a strong -I effect. The electronegativity of oxygen in -OCH3 dominates over the +I of-CH3 and thus the overall group gives a negative inductive effect.
Which has more +I effect CH3 or OCH3?
-CH3 Shows more +I effect than -OCH3 because methoxy group contains oxygen which is electronegative in nature result in -I effect.
Which group will show more +I effect?
In short, alkyl groups tend to donate electrons, leading to the +I effect.
Does COOH show +I effect?
The oxygen atom in the -COOH group is highly electronegative. Thus, this atom pulls electrons of sigma bond towards itself attributing to electron withdrawing nature of the group. So, now we can say that the -COOH group is an electron-withdrawing in nature. Thus, it will show -I effect.
Does methoxy group shows which inductive effect?
b) -OCH3 (methoxy group) The methoxy group is electron withdrawing by the inductive effect of the oxygen atom, since the electronegativity of oxygen is 2.6. This is reflected in the positive value for σm.
What is the +I effect?
+I Effect (Positive Inductive Effect) When a chemical species with the tendency to release or donate electrons, such as an alkyl group, is introduced to a carbon chain, the charge is relayed through the chain and this effect is called the Positive Inductive Effect or the +I Effect.
Which has more i effect OCH3 or OH?
Answer: Negative inductive effect (-I effect) or electron withdrawing effect is shown by the groups which have more electronegativity. OCH3 group is more electron withdrawing (i.e, shows more -I effect) than the OH group.
Is OCH3 Ortho para or meta directing?
Both –OCH3 and –Ph are activating, ortho-/para-directing groups.
What is the order of +I effect?
So→COO−>−O−>−NˉH>−CˉH2.
Which of the following has strong +I effect?
−NH−CH3.
Which has more minus I Effect?
Negative inductive effect (-I effect) or electron withdrawing effect is shown by the groups which have more electronegativity. OCH3 group is more electron withdrawing (i.e, shows more -I effect) than the OH group. WHY? The reason is that, there are two lone pairs of oxygen.
Which is more activating OH or och3?
One may also ask, which is more activating OH or och3? And for mesomeric effect they are both almost same activating, but if you consider small R groups like CH3, and corresponding inductive effect then OH is likely to be more activating through -I.E. relative to the -I.E. of OCH3 despite CH3 being a +I.E. For higher R groups OR is more deactivating.
Why is OCH resonant?
OCH. Resonance is due to the lone pair present on the oxygen make it electron donating group. This increase the electron density of ortho and para position and make it electron donating group.
Why is the methyl group close to the lone pair electrons?
Oxygen has a smaller size, so in case of OCH 3, the methyl group is close to the lone pair electrons, which leads to Steric repulsion.
Which effect is shown by the groups which have more electronegativity?
Negative inductive effect (-I effect) or electron withdrawing effect is shown by the groups which have more electronegativity .
Does OH have a steric repulsion?
However, in case of OH, the H atom is comparatively much much smaller than O, so here no Steric repulsion takes place. OH shows -I effect just due to the electronegativity value of Oxygen.
Why is OCH3 more strongly activating than CH3 in electrophilic aromatic substitution?
Why is -OCH3 more strongly activating than -CH3 in electrophilic aromatic substitution? Facts I know: 1) More the electron density in benzene ring, the faster the reaction. 2) Lone pair on -OCH3 group undergoes resonance and makes ortho-para positions electron rich, and so does -CH3 by hyperconjugation. 3) -OCH3 group shows -I (electron ...
What is the transition state of an electrophilic aromatic substitution?
For electrophilic aromatic substitution, there is a high energy carbocation, the Wheland intermediate, formed when the benzene derivative attacks the electrophile. Formation of this intermediate is normally the rate determining step. Since this carbocation is high in energy, the transition state leading to it is going to be similar in structure, according to the Hammond Postulate. So, looking at the influence of varying substituents on the stability of these Wheland intermediates is a good approach to justifying differences in reaction rates (not to mention selectivities).
Is OCH3 or CH3 electron rich?
Now, -OCH3 and -CH3 both undergo resonance and hyperconjugation respectively and both make ortho/para positions equally electron rich.
What effect is more the - I effect in the species?
More the - I effect in the species is, more is its acidic order.
Why is X an electron-withdrawing group?
Here, X is an electron-withdrawing group or - I group because it withdraws electrons from Carbon.
Is NF3+ electronegative?
NF3+, NR+, and NH3+ are highly electronegative or high - I effect showing groups.
Does COO+ have electrons?
However, if the species has a positive charge like F - CH2 - COO+. Here, F tries to pull the electron from COO+ as it doesn’t have electrons for distribution. Therefore,
