Coordination Compound

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coordination compound

[kō‚ȯrd·ən′ā·shən ‚käm‚pau̇nd]
A compound with a central atom or ion and a group of ions or molecules surrounding it. Also known as coordinated complex; Werner complex.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Coordination Compound


any of a group of compounds of complex composition. In these compounds, molecules of water, ammonium, acids, and salts are added to the complex ion. Examples of coordination compounds are crystal hydrates of the [Co(NH3)6]2(SO4)3·5H2O, type, various ammoniates, such as Cu[PtCl6]·18NH3, and various salts, such as (NH4)3[RuCl6]NH4NO3. Possessing an electrostatic field, the complex ion attracts dipolar molecules, forming in solution a second or even a third coordination sphere. The formation of coordination compounds can involve oxidation-reduction reactions, Van der Waals forces, and hydrogen bonds. Coordinated molecules or ions, for example, SCN in the compound [(NH3)2PtSCNSCNAg]NO3, can serve as secondary centers of addition.


Grinberg, A. A. Vvedenie v khimiiu kompleksnykh soedinenii, 2nd ed. Moscow-Leningrad, 1951.
Khimiia koordinatsionnykh soedinenii. Edited by J. Bailar and D. Busch. Moscow, 1960. (Translated from English.)
Nekrasov, B. V. Osnovy obshchei khimii, vol. 3. Moscow, 1970.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
This coordination compound was prepared by dissolving the ligand (0.4734 g, 2 mmol) in 20 mL distilled water followed by slow addition of copper(II) acetate monohydrate Cu[(C[H.sub.3]COO).sub.2] x [H.sub.2]O (0.1996 g, 1 mmol) dissolved in 10 mL methanol.
Reducing agents are inorganic and organic compounds used to prepare metal nanoparticles by decreasing oxidation states of metallic ions in coordination compounds or metallic salts to zero.
Some atom net charges of coordination compound Co 0.00104 [C.sub.1] 0.2494 [C.sub.8] -0.1351 [C1.sub.1] -0.2564 [C.sub.2] -0.1111 [C.sub.9] 0.2489 [C1.sub.2] -0.2066 [C.sub.3] 0.1826 [C.sub.10] -0.1496 [C1.sub.3] -0.2741 [C.sub.4] -0.1205 [C.sub.11] 0.2067 [C1.sub.4] -0.2585 [C.sub.5] 0.2509 [C.sub.12] -0.1111 [N.sub.1] -0.05846 [C.sub.6] -0.0489 [C.sub.13] 0.2189 [N.sub.2] -0.05724 [C.sub.7] -0.0800 [C.sub.14] -0.0890 [C.sub.15] -0.0884 [C.sub.16] -0.1214 [H.sub.N1] 0.1802 [H.sub.N2] 0.1563 [H.sub.2] 0.0443 [H.sub.4] 0.0561 Table 6.
The reaction of I with appropriate metal salts in 1 : 1 molar ratio in MeOH produces the coordination compounds of the types [[Co(LH)(MeOH)].sub.2], [[Cu(LH)].sub.2], [Zn(LH)[(MeOH).sub.2]], [Zr[(OH).sub.2](LH)(MeOH)], and [Mo[O.sub.2](LH)[(MeOH).sub.2]].
This ability allows these compounds to be used to make various polymerizable materials, including charge-transfer complexes and coordination compounds. Heterocyclic triaryl-diolefin ligands were synthesized using two major synthetic routes.
He further explores the use of palladium coordination compounds in asymmetric transformations.
Since it was recognized, the interest in the preparation of INH coordination compounds with transition metals and their screening against biological activities have been carried out [18-21].
Ag(I) coordination compounds with a variety of ligands having nitrogen, phosphorus, and/or sulfur donor atoms have large applications in medicinal and analytical chemistry [1, 2].
Infrared and Raman Spectra of Inorganic and Coordination Compounds, sixth ed., John Wiley & Soons Inc.

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