When the carbonyl group of a neutral ketone is protonated,

O the resulting species becomes more electrophilic.

O the resulting species is activated toward nucleophilic attack.

O subsequent nucleophilic attack on the resulting species is said to occur under acid-catalyzed conditions.

O the resulting species has a positive charge.

O All of these.

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Analyn TolentinoLv10

11 Jan 2021

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graylouse963

Question-1

On electrophilic substitution, the electrophiles will attack on the nitrogen atom in pyridine ring, will not prefer meta carbon position. Because nitrogen is more nucleophilic than Carbon. The electrophilic substitution like bromination can be done by activating pyridine ring with oleum at 130⁰c . On electrophilic substitution, the attack will be on the meta position. Because in the resonance structure of pyridine both ortho and meta postions are electrophilic, while meta position is nucleophilic. (Note: only by drawing the structure of pyridine, it will be more understandable)

Question-2

Gas chromatography â mass spectrometer(GC-MS) is a spectrophotometer used in organic chemistry to identify or to detect the elements present in a particular sample. It will help to identify the compound or an unknown sample, from the gas chromatograph obtained from GC MS. It will determine the molecular formula of compound.

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Q1 can you draw?