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The stability of 2,3-dimethyl but-2-ene is more than 2-butene. This can be explained in terms of:
The former possesses 12α-H atom whereas, later possesses six α-H atom. More is the no. α-H atom, more is delocalisation and more is stability.
Who pointed out the concept of hyperconjugation?
(a)
Those chemists who received their training in physical organic chemistry in the pre-1975 era probably remember the Baker-Nathan effect. The paper will then examine how Baker and his collabora- tor Nathan discovered what was believed to be the first example of hyperconjugation.
(CH3)4N+ is neither an electrophile, nor a nucleophile because it:
Note the fact.
Which of the following is an electrophilic reagent?
(b)
BF3 is a electron deficient compound . it has 6 electron in place of 8 electron around
The +I.E.(inductive effect) is shown by:
(a) -CH3 is electron repelling group
The-I effect is shown by:
(a) -COOH is electron withdrawing group.
Which of the following is singlet carbene ?
(b) An organic reaction intermediate, neutral species having divalent carbon atom with six valence electron out of which two are present in same orbital with opposite spin is called singlet carbene.
The maximum number of alkyl groups in C8H18 is:
(a) (CH3)3C-C(CH3)3 has maximum number of alkyl groups in it.
The increasing order of +ve I-effect shown by H, CH3, C2H5 and C3H7 is:
(a) Follow inductive effect.
To which ring size cycloalkanes, Baeyer’s strain theory is not valid?
(d) The closed ring cycloalkanes beyond five carbon atoms has puckered ring structure maintaining tetrahedral nature or strainless rings, e.g.. cyclo hexane has chair and boat form.
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