| Manganese(ii) Chloride |
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Information AboutManganese(ii) Chloride |
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Manganese(II) chloride (MnCl2) is a pink salt of Manganese and Chlorine . It occurs naturally as the mineral Scacchite . It is ionic and it dissolves in water to give a solution with a pH of around 4. CHEMICAL PROPERTIES Since manganese(II) chloride is soluble in water, it can be used to prepare a variety of manganese salts, e.g., MnCl2( Aq ) + K2CO3 ( Aq ) → MnCO3 ( S ) + 2 KCl ( Aq ) It is a weak Lewis Acid , reacting with Chloride ion in Ethanol to produce salts containing the {Link without Title} 2- ion. It forms Complexes with Ligand s such as Triphenylphosphine (see "uses"). PREPARATION Manganese(II) chloride may be prepared from Manganese metal or Manganese(II) Carbonate reacting with Hydrochloric Acid . It is also produced when manganese(IV) oxide is heated with concentrated Hydrochloric Acid ; this reaction was formerly used for the manufacture of Chlorine . MnO2 ( S ) + 4 HCl ( Aq ) → MnCl2( Aq ) + Cl2 ( G ) + 2 H2O (l ) USES In the laboratory, ''manganese(II) chloride'' serves as a starting point for the synthesis of a variety of manganese compounds. For example, manganocene may be prepared by reaction of MnCl2 with Cyclopentadienylsodium in THF . MnCl2 reacts with Ligand s such as Triphenylphosphine to produce Metal Complexes : MnCl2 + 2 Ph3P → {Link without Title} PRECAUTIONS Manganese poisoning, also known as manganism, may be caused by long-term exposure to manganese dust or fumes. The symptoms resemble Parkinson's and are similar to Lead Poisoning but may not appear for months or even years after exposure. There is no cure for manganism. SUPPLIERS/MANUFACTURERS REFERENCES # N. N. Greenwood, A. Earnshaw, ''Chemistry of the Elements'', 2nd ed., Butterworth-Heinemann, Oxford, UK, 1997. # ''Handbook of Chemistry and Physics'', 71st edition, CRC Press, Ann Arbor, Michigan, 1990. # A. F. Wells, '''Structural Inorganic Chemistry'', 5th ed., Oxford University Press, Oxford, UK, 1984. # ''The Merck Index'', 7th edition, Merck & Co, Rahway, New Jersey, USA, 1960. EXTERNAL LINKS |
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