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Shapes of complex ions

The shapes of complex ions depend on
  • co-ordination number or number of co-ordinate bonds formed with the metal ion
  • size of ligand
Complex ions with a co-ordination number of six form octahedral complexes. Complex ions with a coordination number of 4 form tetrahedral or square planar complexes and complex ions with a co-ordination number of two are linear.

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Specification: OCR Chemistry A (H432), A-level, 5.3.1 Transition elements. Topic: Transition Metals.

Key terms in this lesson

ligand
An atom, ion or molecule that donates a pair of electrons to a central metal ion to form a co-ordinate bond.

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