The IUPAC name of the compound is
pent-4-yn-2-ene
pent-3-en-1-yne
pent-2-en-4-yne
pent-1-yn-3-ene
Consider the reactions,
The mechanisms of reactions (i) and (ii) are respectively
SN 1 and SN2
SN 1 and SN1
SN 2 and SN 2
SN 2 and SN1
A.
SN 1 and SN2
C2H5OH being a weaker nucleophile, when used as a solvent in case of hindered 1 ° halide, favours SN 1 mechanism while C2H5O- being a strong nucleophile in this reaction favours SN 2 mechanism.
In which of the below reaction do we find unsaturated carbonyl compounds undergoing a ring closure reaction with conjugated dienes?
Perkin reaction
Diels-Alder reaction
Claisen rearrangement
Hofmann reaction
Consider the following carbocations,
The correct sequence of the stability of these is
II < I < III < IV
II < III < I < IV
III < I < II < IV
IV < III < I < II
2 2-dichloro propane on hydrolysis yields
acetone
2, 2-propane diol
isopropyl alcohol
acetaldehyde
For synthesis of 1-butene, CH3MgI should be treated with
propene
2-chloropropene
allyl chloride
ethyl chloride
Ethylidene dichloride is obtained by the reaction of excess of HCl with
ethylene
acetylene
propene
methane