Aldehydes Flashcards

1
Q

What planar carbon compounds are studied as part of your course?
(7)

A

Alkenes

Alkynes

Aldehydes

Ketones

Carboxyl acids

Esters

Aromatic compounds

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2
Q

What is the functional group of aldehydes?

A

The -CHO group

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3
Q

What is the general formula of the aldehydes?

A

RCHO

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4
Q

What is the general formula for the homologous series of aliphatic aldehydes?

A

CnH2n+1 CHO

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5
Q

How are aldehydes named?

A

They are named from the parent alkane by changing the -e ending to -al

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6
Q

What is the aldehyde corresponding to methane?

A

Methanal

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7
Q

What is the aldehyde corresponding to ethane?

A

Ethanal

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8
Q

What is the aldehyde corresponding to propane?

A

Propanal

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9
Q

Name the aldehyde given by the formula HCHO

A

Methanal

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10
Q

Name the aldehyde given by the formula CH3CHO

A

Ethanal

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11
Q

Name the aldehyde given by the formula C2H5CHO

A

Propanal

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12
Q

Name the aldehyde given by the formula C3H7CHO

A

Butanal

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13
Q

Name the aldehyde given by the formula C3H7CHO

A

2-methylpropanal

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14
Q

What is the formula of Methanal

A

HCHO

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15
Q

What is the formula of ethanal?

A

CH3CHO

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16
Q

What is the formula of propanal?

A

C2H5CHO

17
Q

What is the formula of butanal?

A

C3H7CHO

18
Q

What is the formula of 2-methylpropanal

A

C3H7CHO

19
Q

Where must the aldehyde functional group always occur?

A

At the end of the carbon chain

20
Q

What is the structure of the carbonyl group

A

O
||
-C

21
Q

Describe the bond angles in the carbonyl group.

A

The carbonyl group and the atoms to which it is bonded all lie in the one plane with all bond angles of 120 degrees

22
Q

What is the main difference between the C = O and the C = C group in ethene?

A

The carbonyl group is strongly polar

23
Q

Why is the carbonyl group strongly polar?

A

Due to the different electronegativity values of carbon and oxygen