CAIE A-Level Chemistry Structural, Displayed and Skeletal Formulae
Practise representing organic molecules in accepted formula styles while preserving unambiguous connectivity.
- Syllabus
- 2028–2030
- Course
- Chemistry 9701
- Level
- AS
Practise representing organic molecules in accepted formula styles while preserving unambiguous connectivity.
4(CH3)3CCHO is used in the synthesis of some antibiotics.
X, Y and Z are all isomers of (CH3)3CCHO.
A summary of some of the reactions and properties of X, Y and Z is shown in the table.

Draw the skeletal formula of Z.

M1: skeletal alkene group AND C5 structure
M2: one alcohol group
M3: branched chain AND capable of geometrical isomerism