"A coordination complex is a chemical compound consisting of a central atom or ion, which is usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents."
Complexes of a central metal ion and a group of surrounding atoms or molecules, usually called ligands.
Lewis acid-base theory: A theory that explains the formation of coordination compounds by the interaction between a metal ion (Lewis acid) and one or more electron-pair donors (Lewis bases).
Ligands: Molecules or ions that bind to a metal ion to form a coordination compound. They can be classified into different types depending on their mode of attachment to the metal ion.
Coordination number and geometry: The number of ligands that bind to a metal ion and their arrangement around the metal center, respectively.
Isomerism: The existence of different compounds with the same chemical formula but different arrangements of atoms or ligands. Coordination compounds can exhibit different types of isomerism like geometric, structural, and optical isomerism.
Stability of coordination compounds: The factors that influence the stability of coordination compounds like the nature of the metal ion, the ligands, and the conditions of the reaction.
Nomenclature of coordination compounds: The rules for naming coordination compounds based on the names of ligands, metal ion, and its oxidation state.
Electronic spectra of coordination compounds: The absorption of electromagnetic radiation by coordination compounds due to the electronic transitions within the metal ion and/or the ligand.
Magnetic properties of coordination compounds: The behavior of coordination compounds in a magnetic field due to the presence of unpaired electrons in the metal ion or ligand.
Reaction mechanisms of coordination compounds: The pathways and mechanisms by which coordination compounds undergo various chemical reactions like substitution, addition, and redox reactions.
Bioinorganic chemistry: The study of the role of coordination compounds in biological systems like enzymes, transporters, and metabolic pathways. It involves the coordination chemistry of metal ions like iron, copper, zinc, and magnesium.
Mononuclear Coordination Compounds: These are compounds that are composed of a single central metal ion bound to a number of ligands.
Polynuclear Coordination Compounds: These are coordination compounds that contain more than one central metal ion bound to one or more ligands.
Homoleptic Coordination Compounds: These are compounds composed of ligands of the same type bound to the central metal ion.
Heteroleptic Coordination Compounds: These are compounds composed of more than one type of ligand bound to the central metal ion.
Chelates: These are coordination compounds that have a ligand with two or more coordinating atoms that form a ring which binds to the central metal ion.
Bridging Compounds: These are compounds whose ligands are bound to two or more central metal ions, bridging them together.
Solvates: These are coordination compounds with one or more solvent molecules bound to the central metal ion.
Inclusion Complexes: These are coordination compounds which have a guest molecule or ion bound inside a cavity formed by the central metal ion and the ligands.
-ates: These are coordination compounds that are made up of a central metal ion and a polyatomic anion with an -ate suffix (e.g. sulfate).
Polydentate Ligands: These are ligands that have more than one coordinating atom and bind to the central metal ion at multiple sites.
Ambidentate Ligands: These are ligands that have two or more sites of coordination on the same ligand molecule, but only one site binds to the central metal ion at a time.
Metalloproteins: These are coordination compounds made up of a central metal ion bound to ligands in a protein structure.
Heterobimetallic complexes: These are compounds containing two different central metal ions that are bound to the same ligand.
Metalloporphyrins: These are coordination compounds composed of a central metal ion (usually iron or copper) bound by a porphyrin molecule.
Metal-organic frameworks (MOFs): These are coordination compounds with porous structures composed of metal ions or clusters linked together by organic ligands.
"A coordination complex is a chemical compound consisting of a central atom or ion...and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents."
"The central atom or ion in a coordination complex is usually metallic."
"A surrounding array of bound molecules or ions, [in a coordination complex], that are in turn known as ligands or complexing agents."
"Many metal-containing compounds, especially those that include transition metals (elements like titanium that belong to the periodic table's d-block), are coordination complexes."
"[Transition metals are] elements like titanium that belong to the periodic table's d-block."
"Ligands or complexing agents [are] bound molecules or ions" to the central atom or ion.
"Ligands or complexing agents...surround the central atom or ion in a coordination complex."
"The coordination center...is the central atom or ion in a coordination complex."
"The central atom or ion in a coordination complex is usually metallic."
"Many metal-containing compounds, especially those that include transition metals...are coordination complexes."
"[Transition metals] belong to the periodic table's d-block."
"A coordination complex is a chemical compound consisting of a central atom or ion, [while a simple compound does not have this specific structure]."
"Ligands...are in turn known as complexing agents."
"Ligands or complexing agents...surround the central atom or ion."
"Ligands or complexing agents...are in turn known as complexing agents."
"A coordination complex is a chemical compound consisting of a central atom or ion..."
"The surrounding array of bound molecules or ions...are in turn known as ligands or complexing agents."
"The central atom or ion in a coordination complex is usually metallic."
"Many metal-containing compounds, especially those that include transition metals...are coordination complexes."