Which of following is not a characteristic of a carbonyl group? a. sp^2 hybridiz

Question

Which of following is not a characteristic of a carbonyl group? a. sp^2 hybridized carbon atom b. planar geometry about the carbonyl bond c. carbonyl carbon atom is electrophilic d carbonyl oxygen atom is nucleophile e weakly polarized carbon to oxygen bond f, All are characteristics of the carbonyl group which of the following would have the most DE shielded protons in the NMR spectrum ? a) (CH) C b) (CH)) N c) (CH_3)_3 O d) CH_3 F What would you expect to be the major product obtained from the reaction? The base peak in a mass spectrum corresponds to the mass to charge ratio of a, the molecular ion b, the most stable carbocation formed c, the M+2 peak d. the highest isotopic peak Which structure below should show 1^H NMR peaks near 7 and 11 ppm and a doublet near 1 ppm and a multiple near 3 ppm? Which is the best leaving group in either S_N 1/E1 or S_N 2/E2? a) Cl b. C = N c. CH_3 CO_2 d. Tosylate (CH_3 - C_6 H_4 - SO_3) e. c and d

Explanation / Answer

37) ans for the question is f i.e all the options are applicable for the carbonyl group

38) and is D i.e CH2 F the proton which ttched to more electronegative atom the proton will be more deshilded scince florine is more electronegative than all so ans is D

39)ans is C bromination will take place ortho to amine because t group is bulky so ortho bromination not possible

40) ans is a

41) ans is D proton near 11 is aldehydic proton, double at 1 beacuse of Ch proton and muliplet at 3 because of 2 ch3 group

42) ans is D

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