A1C13 - alkali chlorides

The electronic spectra of Nbv and Tav chlorides and some reduced forms have been defined in alkali chloride and oxychloride melts.425 Nbv was detected as [NbCl6]- in the basic ionic liquid medium AlCl3-[emim]Cl (emim= l-ethyl-3-methylimidazolium).426 The addition of oxide produced [NbOCls]2-. The nature of Tav in NaCl—A1C13 melts at 175 °C was studied by potentiometry and spectrophotometry.427 For 1.1 < pCl <4.5 and 0 < [Tav] < 0.3 M, the results were consistent with the following equilibrium [TaCl6] TaCls + Cl-. Reduction led to TaIV... 

Chromyl chloride Cr02Cl2 can be prepared by distillation from a mixture of an alkali metal chloride and concentrated sulfuric acid with an alkali metal dichromate or Cr03. It can also be prepared from dichromate and HC1, Cr03 and an acid chloride such as PC15 or HS03C1,222 or Cr03 and A1C13 in molten LiCl/NaCl/KCl.1371... 

The eutectic mixtures of the other aluminum halides with alkali halides also have low melting points (of about 100°C). The phase diagram of the A1C13-NaCl system is given in Figure 40 [390], The phase diagrams of A1C13 mixtures with other alkali metal chlorides have similar shapes. 

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