Isomer & Cycloalkane Flipbook PDF

Isomer & Cycloalkane

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IUPAC Nomenclature of Cycloalkanes 1. In the case of a cycloalkane with an attached alkyl substituent, the ring is the parent hydrocarbon. 2. There is no need to number the position of a single substituent on a ring. 3. If the ring has two different substituents, they are cited in alphabetical order and the number 1 position is given to the substituent cited first.

Cycloalkanes CH2 H2C CH2

=

Cyclopropane

H2C H2C

CH2 CH

CH2 CH2

CH3 Methylcyclohexane

= CH3

Cycloalkanes CH2 H2C

CH CH2CH2CH2CH2CH2CH3 CH2 1-Cyclobutylhexane

(CH2)5CH3

or Hexylcyclobutane

Cycloalkanes H2C H2C

CH2 CH2

CH CH

CH2

CH3

6

=

CH3

1-Ethyl-2-methylcyclohexane

5 4

1

2 3

Name the Following Compounds

Isomerism 

Isomerism – The phenomenon whereby certain chemical compounds have structures that are different although the compounds possess the same elemental composition.



Isomers – Two or more chemical substances having the same elementary composition and molecular weight but differing in structure.

Isomerism 

Consider C4H10



These structures are constitutional

isomers

Isomerism 

Consider C5H12



These structures are constitutional

isomers

Isomerism 

Consider C6H14



These structures are constitutional

isomers