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Which of the following carbanion is aromatic? (a) (b) (c) (d)
Which of the following is aromatic? GENERAL ORGANIC CHEMISTRY
Which of the following is aromatic?
Which of the following is Anti-aromatic? (a) (b) (c)
Which of the following is aromatic? (a) (b) (c) (d)
Which of the following is non-Aromatic? (a) (b) (c)
Which of the following is Aromatic? (a) (b) GENERAL ORGANIC CHEMISTRY (c)
Which of the following is aromatic compound? (a) (b) (c) (d)
Assertion: Cyclopentadienyl anion is much more stable than allyl anion. Reason: Cyclopentadienyl anion is aromatic in character.
Which among the following statements are true with respect to electronic displacement in a covalent bond ? (1) Inductive effect operates through pi bond (2) Resonance effect operates through sigma bond (3) Inductive e…
In which of the following molecule the resonance effect is not present? (a) (b) (c) (d)
Mesomeric effect involves delocalisation of
Which of the following is least stable?
The most unlikely representation of resonance structure of p–nitrophenoxide ion is: (a) (b) (c) (d)
GENERAL ORGANIC CHEMISTRY The most stable canonical structure among these is
The stability order of these canonical structures is
Among these compounds, which one has shortest C—Cl bond?
Which of the following statements is true about this molecule ?
Resonance structure of a molecules should have
Electromeric effect is
Polarisation of electrons in acrolein may be written as (a) (b) (c) (d)
III II I CH CH CH C CH Which of these groups has +I effect ?
In the following benzyl/allyl system (R is alkyl group) decreasing order of inductive effect is
Which of the groups has highest + I effect?
Which of the following has minimum-I-effect?