Complex Ions


A Level Year 13 Chemistry Flashcards on Complex Ions, created by Robert Hebbs on 30/11/2014.
Robert Hebbs
Flashcards by Robert Hebbs, updated more than 1 year ago
Robert Hebbs
Created by Robert Hebbs over 9 years ago

Resource summary

Question Answer
Define a complex ion A metal ion surrounded by coordinately bonded ligands
Define a ligand A species containing a lone pair that can donate to form a coordinate bond with a metal ion
Define a coordinate bond When both electrons in a bond come from one atom
Define coordination number The number of coordinate bonds in a complex ion (not the number of ligands)
Define a bidentate ligand A 'large' ligand which contains two lone pairs on different atoms that can both donate to form coordinate bonds
Define a ligand exchange reaction When ligands are substituted in reaction (can be partial)
\([Cu(H_2O)_6]^{2+}\) Hexaaquacopper(II) Coordination no. = 6 Octahedral Pale blue
\([Fe(H_2O)_6]^{2+}\) Hexaaquairon(II) Coordination no. = 6 Octahedral pale green
\([Fe(H_2O)_6]^{3+}\) Hexaaquacopper(III) Coordination no. = 6 Octahedral Yellow
\([CuCl_4]^{2-}\) Tetrachlorocuprate(II) Coordination no. = 4 Tetrahedral Yellow
\([Cu(NH_3)_4]^{2+}\) Tetraaminecopper(II) Coordination no. = 4 Square Planar deep blue
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