Slides in this set
· Complex: A metal ion surrounded by
· Ligand: an electron pair donor i.e. a
molecule or ion joined onto the metal ion
by a dative covalent bond to the metal.
· Coordination number: The number of
atoms directly joined to a transition metal
by a coordinate (dative covalent) bond.…read more
· Six-coordinate complexes are octahedral.
eg Cu(H2O)62+ Co(NH3)63+
· Four-coordinate complexes are usually
tetrahedral eg CoCl42- but a few are
square planar eg Ni(CN)42-.
· Two-coordinate complexes are linear eg
· Most transition metal colours are due to
d-d electron transitions. The energy gap
between the split d-orbitals corresponds to
visible light (E=hf).
· Some of the really strong colours are due
to charge transfer (such as in MnO4-).…read more