The Alkanes (Leaving Cert Chemistry): Flashcards

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The Alkanes
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Type of bonds in alkanes

Single bonds only

Alkanes bonding characteristic

Saturated (only single bonds)

General formula for alkanes

CnH2n+2C_nH_{2n+2}

Boiling point trend as alkane size increases

Increases

Cause of boiling point increase in alkanes

Stronger van der Waals forces

Chemical reactivity of alkanes

Relatively low/unreactive

Polarity of alkanes

Non-polar molecules

Homologous series: members differ by

CH2CH_2 unit

Homologous series key feature

Same general formula, similar chemical properties

First member of alkane series

Methane (CH4CH_4)

Methyl group structure

CH3CH_3

IUPAC naming: identify this first

Longest continuous carbon chain

IUPAC naming: substituent order

Alphabetical order

Structural isomers definition

Same molecular formula, different structural arrangement

Cyclohexane molecular formula

C6H12C_6H_{12}

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