Integrated SequencePhysics Chemistry Organic Biology

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Module 12 in the Syllabus

Coordination Chemistry Images
Image gallery for study with links to larger teaching JPEGs for classroom presentation

Question Drill for Coordination Chemistry
Conceptual Vocabulary Self-Test

Basic Terms Crossword Puzzle

Basic Puzzle Solution

Conceptual Vocabulary
ComplexA complex is a molecule or ensemble formed by the combination of ligands and metal ions.
Coordinate covalent bondA coordinate covalent bond is a type of covalent bonding between two atoms in which both electrons shared in the bond come from the same atom.
Lewis baseA Lewis base is any molecule or ion that can form a new coordinate covalent bond, by donating a pair of electrons.
LigandA ligand is an atom, ion, or molecule donating one or more of its electrons through a coordinate covalent bond to one or more central atoms or ions
Coordination numberCoordination number is defined as the total number of neighbors of a central atom in a chemical compound.
Inorganic chemistryThe field of inorganic chemistry covers all chemical compounds except the myriad organic compounds, which are the subjects of organic chemistry.
Organometallic chemistryOrganometallic chemistry is the study of chemical compounds containing bonds between carbon and a metal.
ChelationChelation is the binding or complexation of a bi- or multidentate ligand.
18-Electron ruleArising from the size of the valance shell of a transition metal, the 18-electron rule is a rule of thumb used primarily in transition metal chemistry for characterizing and predicting the stability of metal complexes.
Bridging ligandA bridging ligand is an atom or a polyatomic entity that connects two or more metal centres in a complex.
Ligand field theoryApplying molecular orbital theory to transition metal complexes, ligand field theory describes the bonding in coordination complexes.
Crystal field theoryThough not describing bonding, crystal field theory represents a reasonanbly successful model for describing the electronic structure of transition metal compounds which are coordination complexes.
Trigonal bipyramid molecular geometryA trigonal bipyramid is a molecular geometry with one atom at the center and 5 more at the corners of a triangular dipyramid.
Inclusion compoundIn host-guest chemistry an inclusion compound is a complex in which one chemical compound the host forms a cavity which molecules of a second compound the guest are located.
Clathrate compoundA clathrate or cage compound is a chemical substance consisting of a lattice of one type of molecule trapping and containing a second type of molecule.
Sandwich compoundA sandwich compound in organometallic chemistry is any chemical compound containing a metal atom oriented between two arene units.
Advanced terms that may appear in context in MCAT passages
Octahedral molecular geometryOctahedral molecular geometry describes a molecular geometry in which 6 ligands are symmetrically arranged around a central atom in an arrangement having the form of an octahedron.
Coordination polymerCoordination polymer is the term given to a metal coordination compound where a ligands bridge between metal centres to create an infinite array of metal centres.
Transition metal carbene complexA transition metal carbene complex in organometallic chemistry is a compound bearing a formal carbon-metal bond.
SpinelThe spinels are any of a class of minerals which crystallize in the isometric system with an octahedral habit.

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