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Edexcel IAL Chemistry 17.4 ligand definition

A ligand must donate an electron pair, but it does not have to be negatively charged; use lone pairs to reject species such as ethane or ammonium.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
A2

Exam points

  • Define a ligand as an electron-pair donor to a metal ion in a complex.
  • Decide whether species such as CO, OH-, amines, ethane or NH4+ can act as ligands.

17.4—What is meant by the term ‘ligand’ question 1

[Maximum number: 1]

A ligand must be an

A

electron-pair donor

B

electron-pair donor and negatively charged

C

electron-pair acceptor

D

electron-pair acceptor and negatively charged

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