18 Questions
What is the primary reason for the increased stability of aromatic compounds?
Resonance stabilization due to delocalization of π electrons
What is the bond length of each C-C bond in benzene?
1.39 Å
Who is credited with discovering benzene?
Michael Faraday
What is the approximate bond angle in benzene?
120°
What is the characteristic shape of aromatic compounds like benzene?
Planar
What inspired August Kekulé to propose the correct structure of benzene?
A dream about a serpent eating its own tail
What is the result of having more s character in the hybrid orbitals of an atom?
The atom becomes more electronegative
What is the term for a positively charged carbon atom with a valence of +3?
Carbenium ion
What is the name of the scientist who proposed the nomenclature for carbocations?
G.A. Olah
What is the term for the number of electrons in the outer valence shell of a carbocation?
Sextet
What is the reaction type in which carbocations are involved as reactive intermediates?
SN1 and E1
What is the name of the ion whose NMR spectrum was published by Doering et al. in 1958?
Heptamethylbenzenium ion
What is the primary characteristic of homoaromatic compounds?
Presence of a single sp3 hybridized carbon atom interrupting conjugation
What is a necessary condition for a molecule to exhibit homoaromaticity?
One or more homoconjugative interactions closing cyclic conjugation
Which of the following is not a characteristic of homoaromatic compounds?
Presence of a carbocation
What is the primary difference between aromatic and homoaromatic compounds?
Presence of an sp3 hybridized carbon atom
Which of the following is a criterion for homoaromaticity?
Effective overlap between the π-orbitals of the cyclic system
What is the significance of homoaromatic compounds?
They display aromatic behavior despite an sp3 hybridized carbon atom
Test your understanding of carbocations, which are ions with a positively-charged carbon atom, and how hybridization affects the electronegativity of an atom. Learn about the characteristics of carbocations and their significance in chemistry.
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