Study Set Content:
Compounds result from a donor (electron pair donor nonmetallic atom or ion) acceptor (metallic ion) mechanism or lewis acid-base reaction between two or more different chemical constituents
COMPLEXES OR COORDINATION
donor
electron pair donor nonmetallic atom or ion
acceptor
metallic ion
CLASSIFICATION OF COMPLEXES
Metal Complexes
Organic molecular complexes
Inclusion/Occlusion compounds
Metal Complexes
Inorganic type ✓ Chelates ✓ Olefin type ✓ Aromatic type
Aromatic type
Pi (𝜋)
▪ Sigma (𝜎) complexes
▪ "sandwich" compounds
Organic molecular complexes
✓ Quinhydrone type ✓ Picric acid type ✓ Caffeine and other drug complexes ✓ Polymer type
Inclusion/Occlusion compounds
✓ Channel lattice type
✓ Layer type
✓ Clathrates
✓ Monomolecular type
✓ Macromolecular type
A complex ion that has a metal Ion at its center with a center number of other molecules or ions surrounding it.
METAL COMPLEXES
These can be considered to be attached to the central ion by
co-ordinate bonds
co-ordinate bonds
(dative covalent)
Inorganic Complexes - the molecules or ions surrounding the central metal ion are called
ligands
All ligands are
lone pair donors
n other words, all ligands function as
Lewis bases
NATURE OF LIGANDS
Monodentate Ligands
Bidentate ligands
Polydentate ligands
has only one donor atom used to bond to the central metal atom or lon.
Monodentate Ligands
The “monodentate" can be translated as
"one tooth,"
The “monodentate" can be translated as "one tooth," referring to the ligand binding to the center through only
one atom
have two donor atoms which allow them to bind to a central metal atom or ion at two points.
Bidentate ligands
ethylenediamine (en)
Bidentate ligands
