Chromium acetate hydroxide is the
coordination complex
A coordination complex consists 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. Many ...
with the formula
r2(OH)3(OAc)3sub>4. A dark violet solid, it crystallizes as the triacontatetrahydrate (34 molecules of
water of crystallization
In chemistry, water(s) of crystallization or water(s) of hydration are water molecules that are present inside crystals. Water is often incorporated in the formation of crystals from aqueous solutions. In some contexts, water of crystallization is ...
). It is water soluble.
Structure
The complex is a
tetramer
A tetramer () (''tetra-'', "four" + '' -mer'', "parts") is an oligomer formed from four monomers or subunits. The associated property is called ''tetramery''. An example from inorganic chemistry is titanium methoxide with the empirical formula Ti ...
of binuclear Cr
2(OH)
3(OAc)
3. The subunits are linked by
acetate
An acetate is a salt (chemistry), salt formed by the combination of acetic acid with a base (e.g. Alkali metal, alkaline, Alkaline earth metal, earthy, Transition metal, metallic, nonmetallic or radical Radical (chemistry), base). "Acetate" als ...
and
hydroxide
Hydroxide is a diatomic anion with chemical formula OH−. It consists of an oxygen and hydrogen atom held together by a single covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water. I ...
ligand
In coordination chemistry, a ligand is an ion or molecule (functional group) that binds to a central metal atom to form a coordination complex. The bonding with the metal generally involves formal donation of one or more of the ligand's electr ...
s. The oxidation state of chromium is III, which explains the stability of the complex since octahedral d
3 ions give kinetically robust complexes. Overall, the complex's structure is unusual compared to other
transition metal carboxylate complexes.
See also
*
Chromium(II) acetate
Chromium(II) acetate hydrate, also known as chromous acetate, is the coordination compound with the formula Cr2(CH3CO2)4(H2O)2. This formula is commonly abbreviated Cr2(OAc)4(H2O)2. This red-coloured compound features a quadruple bond. The prepara ...
*
Chromium(III) acetate
Chromium(III) acetate, commonly known as basic chromium acetate, describes a family of salts where the cation has the formula r3O(O2CCH3)6(OH2)3sup>+. The trichromium cation is encountered with a variety of anions, such as chloride and nitrate. ...
References
External links
*http://www.chemicalbook.com/ChemicalProductProperty_EN_CB9726110.htm
*http://www.chemicalbook.com/CAS%5Cmol%5C39430-51-8.mol
*https://web.archive.org/web/20120119193658/http://www.sigmaaldrich.com/catalog/ProductDetail.do?D7=0&N5=SEARCH_CONCAT_PNO%7CBRAND_KEY&N4=318108%7CALDRICH&N25=0&QS=ON&F=SPEC
{{Acetates
Chromium(III) compounds
Acetates
Hydroxides
Coordination complexes
Reducing agents
Chromium–oxygen compounds