Ligands are..
Molecules or anions which attach to a transition metal in a complex via dative bonds
Anions are
Overall negative
Cations are
Overall positive
Combination of ligand and metal
Complex ion
How can ligands be classified
Monodentate, bidentate, up to hexadentate.
Or polydentate
Definition of bidentate ligand
Ligand that bonds to metal using two donor sights.
Example of polydentate ligand
Chlorophyll or haemoglobin
Coordination number is
Number of bonds transition metal makes with ligand(s)
How to determine shape of complex ion
Coordination number = number of electron pair from shape previously.
Ie 3 = trigonal planar