Number of atoms, molecules or ions bonded to a molecule or crystal
In chemistry, crystallography, and materials science, the coordination number, also called ligancy, of a central atom in a molecule or crystal is the number of atoms, molecules or ions bonded to it. The ion/molecule/atom surrounding the central ion/molecule/atom is called a ligand. This number is determined somewhat differently for molecules than for crystals.
For molecules and polyatomic ions the coordination number of an atom is determined by simply counting the other atoms to which it is bonded (by either single or multiple bonds).[1] For example, [Cr(NH3)2Cl2Br2]− has Cr3+ as its central cation, which has a coordination number of 6 and is described as hexacoordinate. The common coordination numbers are 4, 6 and 8.
^IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "coordination number". doi:10.1351/goldbook.C01331
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and materials science, the coordinationnumber, also called ligancy, of a central atom in a molecule or crystal is the number of atoms, molecules or ions...
construction Coordination complex, consisting of a central atom or ion and a surrounding array of bound molecules or ions Coordinationnumber or ligancy...
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...
observed. The coordination geometry depends on the number, not the type, of ligands bonded to the metal centre as well as their locations. The number of atoms...
voids. Coordination polymers are relevant to many fields, having many potential applications. Coordination polymers can be classified in a number of ways...
In coordination chemistry, the first coordination sphere refers to the array of molecules and ions (the ligands) directly attached to the central metal...
general chemistry textbooks, hybridization is presented for main group coordinationnumber 5 and above using an "expanded octet" scheme with d-orbitals first...
Molecules IUMSC – Indiana University Molecular Structure Center Interactive molecular examples for point groups [1] – Coordination numbers and complex ions...
describing the coordination of the silicate is by a number: in the case of the silica tetrahedron, the silicon is said to have a coordinationnumber of 4. Various...
bulk coordinationnumber of an atom in a crystal lattice in which all atoms have the same size (as in a chemical element). A coordinationnumber of 12...
value of 6.02214076×1023 mol−1 (reciprocal moles). It is defined as the number of constituent particles (usually molecules, atoms, or ions) per mole (SI...
covalent bonds, and it bears a +1 formal charge. But IUPAC confuses coordinationnumber with valence, incorrectly considering carbon in carbenium as trivalent...
oxalate tetrahydrate has coordinationnumber 10, and the borohydride (first prepared in the Manhattan Project) has coordinationnumber 14. These thorium salts...
depending on coordinationnumber and what the carbon is bonded to. In general, covalent radius decreases with lower coordinationnumber and higher bond...
Silver crystallizes in a face-centered cubic lattice with bulk coordinationnumber 12, where only the single 5s electron is delocalized, similarly to...
surrounding a metal center, labeled M. More simply, it represents the number of coordination sites occupied on the metal. Based on the covalent bond classification...
have a coordinationnumber of 6, meaning they are surrounded by an octahedron of 6 oxygen atoms. The oxygen anions have a coordinationnumber of 3, resulting...
compounds. His insight allowed chemists to rationalize the number of isomers of coordination compounds. Octahedral transition-metal complexes containing...
graph, each node is connected to z neighbors; the number z is called either the coordinationnumber or the degree, depending on the field. Due to its...
important characteristic of a crystalline structure is its coordinationnumber (CN). This is the number of nearest neighbours of a central atom in the structure...
on the atomic chart, the type of chemical bond, the number of neighboring atoms (coordinationnumber) and a quantum mechanical property known as spin. On...