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- DictionaryCoordination compound
noun
- 1. a compound containing coordinate bonds, typically between a central metal atom and a number of other atoms or groups.
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coordination compound, any of a class of substances with chemical structures in which a central metal atom is surrounded by nonmetal atoms or groups of atoms, called ligands, joined to it by chemical bonds. Coordination compounds include such substances as vitamin B 12, hemoglobin, and chlorophyll, dyes and pigments, and catalysts used in ...
Jun 30, 2023 · Introduction to Coordination Chemistry. Complexes or coordination compounds are molecules that posess a metal center that is bound to ligands (atoms, ions, or molecules that donate electrons to the metal). These complexes can be neutral or charged. When the complex is charged, it is stabilized by neighboring counter-ions.
The coordination centre, the ligands attached to the coordination centre, and the net charge of the chemical compound as a whole form the coordination sphere when written together. This coordination sphere is usually accompanied by a counter ion (the ionizable groups that attach to charged coordination complexes).
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An example in coordination compounds is two compounds with the empirical formula Pt(NH 3) 2 Cl 2. One is a simple square planar platinum(II) complex, Pt(NH 3 ) 2 Cl 2 , and the other is an ionic compound that contains the [Pt(NH 3 ) 4 ] 2+ cation and the [PtCl 4 ] 2− anion, [Pt(NH 3 ) 4 ][PtCl 4 ].
Jul 12, 2023 · Coordination compounds have been known and used since antiquity; probably the oldest is the deep blue pigment called Prussian blue: KFe 2(CN) 6. The chemical nature of these substances, however, was unclear for a number of reasons. For example, many compounds called “double salts” were known, such as AlF 3 · 3KF, Fe(CN) 2 · 4KCN, and ZnCl ...
Jul 11, 2019 · A coordination compound is a compound containing one or more coordinate bonds, which is a link between a pair of electrons in which both electrons are donated by one of the atoms. In other words, it is a compound that contains a coordination complex . Read More. Compound Definition in Chemistry. By Anne Marie Helmenstine, Ph.D.
A coordination complex is the product of a Lewis acid-base reaction in which neutral molecules or anions (called ligands) bond to a central metal atom (or ion) by coordinate covalent bonds. Ligands are Lewis bases - they contain at least one pair of electrons to donate to a metal atom/ion. Ligands are also called complexing agents.
