CHROMIUM CHLORIDE HYDRATE PROFESSIONAL
They guarantee professional and customised consultancy and services. The company, which is active in international distribution and trading, is organised into industrial segments that are managed by teams of specialists and experts.
We have been distributing chemical products for over 100 years and we have a special interest in protecting the environment and in the safety of our facilities and collaborators.Įstablished in 1913 as a small grocery store, in its over 100 years of activity ECSA Chemicals has become one of the most important Swiss-owned distributors of chemical products. With an organisation divided into industrial segments managed by specialists, it has become one of the largest distributors worldwide.ĮCSA Chemicals is the largest Swiss-owned company in terms of warehouses for the distribution of chemical products. doi: 10.1021/ja00283a046.ECSA Chemicals has been active since 1913 in the trading and international commerce of raw materials. ^ Simple and selective method for aldehydes (RCHO) -> (E)-haloalkenes (RCH:CHX) conversion by means of a haloform-chromous chloride system K."Expanding the pleuromutilin class of antibiotics by de novo chemical synthesis" Chem. First Synthesis of a Eunicellin Diterpene" J. "Enantioselective Total Synthesis of (−)-7-Deacetoxyalcyonin Acetate. (b) Alois Fürstner, "Carbon−Carbon Bond Formations Involving Organochromium(III) Reagents" Chemical Reviews, 1999, 99 (4), 991–1046 doi: 10.1021/cr9703360 "Chromium(II) Chloride" in Encyclopedia of Reagents for Organic Synthesis John Wiley & Sons: New York 2005.
Handbook of Preparative Inorganic Chemistry.
^ a b Riley, edited by Georg Brauer translated by Scripta Technica, Inc. ^ a b "MSDS of Chromium(II) chloride". ^ a b c Sigma-Aldrich Co., Chromium(II) chloride. Zeitschrift für anorganische und allgemeine Chemie. "Struktur und Eigenschaften des blauen Chrom(II)-chlorid-tetrahydrats CrCl 2.4H 2O". "The crystal structure of chromium(II) chloride". CRC Handbook of Chemistry and Physics (90th ed.). It is also used in the Takai olefination to form vinyl iodides from aldehydes in the presence of iodoform. It is a reagent in the Nozaki-Hiyama-Kishi reaction, a useful method for preparing medium-size rings. The moderate electronegativity of chromium and the range of substrates that CrCl 2 can accommodate make organochromium reagents very synthetically versatile. Alkyl halides and nitroaromatics are reduced by CrCl 2. Since the reduction potential of H + to H 2 in acidic conditions is +0.00, the chromous ion has sufficient potential to reduce acids to hydrogen, although this reaction does not occur without a catalyst.Ĭhromium(II) chloride is used as precursor to other inorganic and organometallic chromium complexes. The reduction potential for Cr 3+ + e − ⇄ Cr 2+ is −0.41. The molecular geometry is approximately octahedral consisting of four short Cr-O bonds (2.078 Å) arranged in a square planar configuration and two longer Cr-Cl bonds (2.758 Å) in a trans configuration. The hydrated derivative, CrCl 2(H 2O) 4, forms monoclinic crystals with the P2 1/c space group. Ball-and-stick model of chromium(II) chloride tetrahydrate. The Cr centres are octahedral, being distorted by the Jahn-Teller Effect. It crystallizes in the Pnnm space group, which is an orthorhombically distorted variant of the rutile structure making it isostructural to calcium chloride. Cr + n H 2O + 2 HCl → CrCl 2(H 2O) n + H 2 Structure and properties Īnhydrous CrCl 2 is white however commercial samples are often grey or green. Treatment of chromium powder with concentrated hydrochloric acid gives a blue hydrated chromium(II) chloride, which can be converted to a related acetonitrile complex. On the laboratory scale, LiAlH 4, zinc, and related reductants produce chromous chloride from chromium(III) precursors:Ĥ CrCl 3 + LiAlH 4 → 4 CrCl 2 + LiCl + AlCl 3 + 2 H 2 2 CrCl 3 + Zn → 2 CrCl 2 + ZnCl 2ĬrCl 2 can also be prepared by treating a solution of chromium(II) acetate with hydrogen chloride: Cr 2(OAc) 4 + 4 HCl → 2 CrCl 2 + 4 AcOH Chromium(II) chloride has no commercial uses but is used on a laboratory-scale for the synthesis of other chromium complexes.ĬrCl 2 is produced by reducing chromium(III) chloride either with hydrogen at 500 ☌: The anhydrous solid is white when pure, however commercial samples are often grey or green it is hygroscopic and readily dissolves in water to give bright blue air-sensitive solutions of the tetrahydrate Cr(H 2O) 4Cl 2. Chromium(II) chloride describes inorganic compounds with the formula Cr Cl 2(H 2O) n.
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