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|Section2= |Section7= |Section8= }} Arsenic trichloride is an inorganic compound with the formula AsCl3, also known as arsenous chloride or butter of arsenic. This poisonous oil is colourless, although impure samples may appear yellow. It is an intermediate in the manufacture of organoarsenic compounds.〔Sabina C. Grund, Kunibert Hanusch, Hans Uwe Wolf "Arsenic and Arsenic Compounds" in ''Ullmann's Encyclopedia of Industrial Chemistry'', VCH-Wiley, 2008, Weinheim.〕 ==Structure== AsCl3 is a pyramidal molecule with C3v symmetry. The As-Cl bond is 2.161 Å and the angle Cl-As-Cl is 98° 25'±30.〔P. Kisliuk; C. H. Townes. "The Microwave Spectra and Molecular Structure of Phosphorus and Arsenic Trichloride". ''J. Chem. Physics'' 1950, 18.〕〔Jean Galy; Renee Enjalbertl Pierre Lecante; Andrzej Burian "AsCl3: From the crystalline to the liquid state. XRD (176< T (K) < 250) and WAXS (295K) studies" ''Inorg. Chem'' 2002, volume 41, pp. 693–698.〕 AsCl3 has four normal modes of vibration: ν1(A1) 416, ν2(A1) 192, ν3 393, and ν4(E) 152 cm−1.〔Klapoetke, Thomas M. "The vibrational spectrum of arsenic trichloride" ''Main Group Metal Chemistry'' 1997, volume 20, pp. 81–83.〕 Arsenic trichloride contains predominantly covalent bonds, which explains its low melting point. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「arsenic trichloride」の詳細全文を読む スポンサード リンク
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