ТЕТРАХЛОРАЛЮМИНАТ НАТРИЯ

Химические свойства

yellow hygroscopic powder(s); used as a catalyst for organic reactions [CRC10] [HAW93]

Использование

Sodium tetrachloroaluminate is used as Friedel-Crafts acylating agent , dehydrating and dehydrogenating agent in organic synthesis.

Определение

A water-soluble pow- der used as catalyst in organic reactions.

Синтез

The stoichiometric amounts of C.P. NaCl and freshly sublimed AlCl3 are introduced into the pear-shaped part of the reaction vessel. The filling is done under nitrogen and the vessel should be very clean and dry. A melting point capillary is then affixed underneath the ground joint; the apparatus is evacuated to a high vacuum. Preparation torch-sealed. It is then immersed as of sodium tetrachloro- deeply as possible in an oil bath at aluminate. 200-240°C. The AlCl3, which tends to sublime onto the cool parts of the wall, is driven back by passing a luminous flame over the condensate spots. When the flask contents have become a nearly clear melt, they are poured hot into the side flask of the vessel. The product solidifies on cooling.
NaCl + A1Cl3 = NaAlCl4