There are seven structural isomers with the molecular formula C5H10O that are carbonyl compounds. Four of these are aldehydes. These four aldehydes, A, B, C and D, have the following properties. - Aldehyde A has a straight chain while B, C and D are branched. - Aldehyde B is the only one of the four isomers with a chiral centre and it exists as a pair of optical isomers. - Aldehyde C has two methyl groups in its structure but D has three. (i) Give the structure of each of the four isomers. (ii) Draw the three-dimensional structures of the two optical isomers of B.

Photo AI

There are seven structural isomers with the molecular formula C5H10O that are carbonyl compounds - CIE - A-Level Chemistry - Question 4 - 2015 - Paper 1

Question 4

There are seven structural isomers with the molecular formula C5H10O that are carbonyl compounds. Four of these are aldehydes. These four aldehydes, A, B, C and D, ... show full transcript

Worked Solution & Example Answer:There are seven structural isomers with the molecular formula C5H10O that are carbonyl compounds - CIE - A-Level Chemistry - Question 4 - 2015 - Paper 1

Step 1

Give the structure of each of the four isomers.

96%

114 rated

Answer

Aldehyde A: The structure is linear, represented as:

Structure of A:

CH3-CH2-CH2-CHO
Aldehyde B: The structure includes a chiral centre:

Structure of B:

CH3-CH(CH3)-CHO
Aldehyde C: Contains two methyl groups:

Structure of C:

(CH3)2CH-CHO
Aldehyde D: Contains three methyl groups:

Structure of D:

(CH3)3C-CHO

Step 2

Draw the three-dimensional structures of the two optical isomers of B.

99%

104 rated

Answer

Optical Isomer 1:
Optical Isomer 2:

97% of Students

Report Improved Results

98% of Students

Recommend to friends

100,000+

Students Supported

1 Million+

Questions answered

There are seven structural isomers with the molecular formula C5H10O that are carbonyl compounds - CIE - A-Level Chemistry - Question 4 - 2015 - Paper 1

Worked Solution & Example Answer:There are seven structural isomers with the molecular formula C5H10O that are carbonyl compounds - CIE - A-Level Chemistry - Question 4 - 2015 - Paper 1

Give the structure of each of the four isomers.

Draw the three-dimensional structures of the two optical isomers of B.

Join the A-Level students using SimpleStudy...

Other A-Level Chemistry topics to explore