The IUPAC name of the following molecule is
5,6-dimethylhept-2-ene
2,3-dimethylhept-5-ene
5,6-dimethylhept-3-ene
5-iso-propylhex-2-ene
The order of decreasing ease of abstraction of hydrogen atoms in the following molecules
Ha > Hb > Hc
Ha > Hc > Hb
Hb > Ha > Hc
Hc > Hb > Ha
B.
Ha > Hc > Hb
Abstraction of (Ha) hydrogen atom results in the formation of 3° allylic carbocation whereas abstraction of He gives 2° allylic carbocation (which is less stable as compared to former one). However, abstraction of Hb gives only a 2° carbocation which is less stable as compared to former two. More the stability of generated carbocation, higher is the tendency of abstraction of hydrogen. Thus. the order of decreasing ease of abstraction of hydrogen atoms from the given molecule is
Ha > Hc > Hb
The best method for the preparation of 2, 2-dimethylbutane is via the reaction of
Me3CBr and MeCH2Br in Na/ether
(Me3C)2CuLi and MeCH2Br
(MeCH2)2CuLi and Me3CBr
Me3CMgI and MeCH2I
In 2-butene, which one of the following statements is true?
C1-C2 bond is a sp3- sp3- -bond
C2- C3 bond is sp3 - sp2- -bond
C1- C2 bond is a sp3 - sp2 - -bond
C1- C2 bond is a sp2- sp2- -bond
The ease of nitration of the following three hydrocarbons follows the order
II - III ≈ I
II > III > I
III > II > I
I = III > II
Among the alkenes which one produces tertiary butyl alcohol on acid hydration?
CH3-CH2-CH=CH2
CH3-CH=CH-CH3
(CH3)2C=CH2
CH3-CH=CH2