Case study·Standard multi-step (3/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
The figure shows two square-planar arrangements of a complex . Arrangement I places the two A ligands adjacent; Arrangement II places them opposite. A medicinal platinum complex has the same type of square-planar arrangement issue.
Total: 3 marks
(a) Which arrangement is the cis form? (1 mark)
(b) Which arrangement is the trans form? (1 mark)
(c) Why can the two forms have different properties even though their formula is the same? (1 mark)
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