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A CYCLIC HYDROCARBON
(ALIPHATIC CYCLIC HYDROCARBONS)
Lec.4 organic chemistry
NOMENCLATURE:
PREPARATION OF CYCLIC COMPOUNDS:
 We have seen that the alkyl groups of two alkyl halides
can be coupled together through conversion of one
halide into an organometallic compound (a lithium dialkyl
copper):
The same method applied to an di halide can bring about
coupling between two alkyl groups that are part of the same
molecule:
REACTION OF CYCLIC COMPOUNDS:
 Cycloalkanes undergo chiefly free-radical substitution For
example:
REACTIONS OF SMALL-RING COMPOUNDS.
CYCLOPROPANE AND CYCLOBUTANE:
 Besides the free-radical substitution reactions that are
characteristic of cycloalkanes and of alkanes in general,
cyclopropane and cyclobutane undergo certain addition
reactions. These addition reactions destroy the cycld
profttrie and cyclobutane ring systems, and yield open-
chain products. For example:

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Lec.4 organic chemistry

  • 1. A CYCLIC HYDROCARBON (ALIPHATIC CYCLIC HYDROCARBONS) Lec.4 organic chemistry
  • 3.
  • 4.
  • 5. PREPARATION OF CYCLIC COMPOUNDS:  We have seen that the alkyl groups of two alkyl halides can be coupled together through conversion of one halide into an organometallic compound (a lithium dialkyl copper): The same method applied to an di halide can bring about coupling between two alkyl groups that are part of the same molecule:
  • 6. REACTION OF CYCLIC COMPOUNDS:  Cycloalkanes undergo chiefly free-radical substitution For example:
  • 7.
  • 8. REACTIONS OF SMALL-RING COMPOUNDS. CYCLOPROPANE AND CYCLOBUTANE:  Besides the free-radical substitution reactions that are characteristic of cycloalkanes and of alkanes in general, cyclopropane and cyclobutane undergo certain addition reactions. These addition reactions destroy the cycld profttrie and cyclobutane ring systems, and yield open- chain products. For example: