Among the following molecule. The most acidic molecule is:
Due to annelation effect compound II and IIl are less acidic.
The correct order of increasing reactivity towards nucleophilic addition for the following carbonyl derivative.
Reactivity towards nucleophile means electrophilicity. Electrophilic character at Carbonyl carbon depends upon the neighbouring group. Electron releasing group decrease electrophilicity and electron withdrawing group increase electrophilicity. Negative charge containing atom are better donar as compared to lone pair containing atom. Less electronegative atom (N) is better donar as compared to more electronegative atom (O).
So electrophilic order.
The above pair is the case of
The product (P) is
In 1H NMR spectrum of ethylbenzene, the benzylic proton appear as a
The more stable conformation of the following compound
In the given compound, all substituent in cis position (above the plane). So, all group must be in up side.
What is the major product ?
In the 300 MHz 1H NMR spectra, an organic compound exhibit doublet. Two lines of the doublet are at δ 2.35 and δ 2.38 ppm. The coupling constant is
Among the carbocations given below
Select the collect option about above compounds
The possible product’s (P) formed in the following reaction mechanism
Correct decreasing order of relative rates of SN2 reactions of alkyl chlorides with iodide ion.
Among the following which compound is non-resolvable?
Correct statements in the following
(a) Migratory apptitucle order for Pinancol-Pinacolone. rearrangement is H > Ph > R
(b) Migratoiy apptitude order for Baeyer Villiger oxidation is Ph > H > R
(c) In Backmann rearrangement, migratoiy group must be anti to hydroyl group
(d) In Pinacole Pinacolone rearrangement. the con ect order of migratoiy aptitude
x = number of (+M) group attached with phenyl ring, so the value of x is
Lone pair containing atom with conjugation show (+M) effect.
A, B, E, F (+ M) effect
C, D, G, H (- M) effect
How many groups are O/P directive in follwing groups
(1) - NH2
(2) - CHO
(3) - N = O
(4) - COOH
(7) - CN
(9) - N = NH2
How many carbocation can rearrange
How many above compounds having C3 axis.
All six structures have C3 axis.
How many compounds (given below) shows three signals in new 13C-NMR spectrum ______ O-xylene, p-xylene, 1, 4-dimethoxybenzene, trans-1,2-dimethylcyclopropane, 4-bromoanisole, cis-1, 2 dimethylcyclopropane, Resorcinol
How many functional groups will involve in reduction process?
Total number of functional groups reduced are two