Molybdenum(III) chloride

Molybdenum trichloride

Red solid

Fixed

3.58 g · cm -3 ( 25 ° C)

410 ° C ( decomposition)

Insoluble in water

Attention

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Molybdenum ( III) chloride is an inorganic chemical compound of molybdenum from the group of chlorides.

Production and representation

Molybdenum ( III) chloride can be obtained by reaction of molybdenum ( V) chloride, or with hydrogen, tin ( II) chloride.

Properties

Molybdenum (III ) chloride is a copper- red to brown powder, which is stable indefinitely at room temperature under inert gas. In moist air is a slow hydrolysis and oxidation. It is insoluble in water, dilute hydrochloric acid, acetone, carbon tetrachloride, benzene, ethanol and ether, but soluble in dilute nitric acid and concentrated sulfuric acid. Above 410 ° C takes place in disproportionation molybdenum ( II) chloride and molybdenum ( IV) chloride. The connection occurs in two modifications. The α - form has a monoclinic crystal structure of aluminum (III ) chloride - type with the space group C2 / m (a = 609.2 pm, b = 974.5 pm, c = 727.5 pm, ß = 124.6 °). The β - form also has a monoclinic crystal structure with space group C2 / c (a = 611.5 pm, b = 981.4 pm, c = 1190.6 pm, β = 91.0 °).