| abstract |
1502567 Complexes MONTEDISON SpA 24 March 1976 [28 March 1975] 11917/76 Heading CIA [Also in Divisions C2 C3 and B1] Novel complexes of the formula wherein M = Mg, Mn and/or Ca; m = from 0À5 to 2; M<SP>1</SP> = Ti, V or Zr; X = Cl, Br or I; Y=one or more of halogen or halogen and oxygen, in an amount to satisfy the valence of M<SP>1</SP>; and are prepared by reacting a halide MX 2 at from room temperature to 150‹ C. with a compound M'Y in POCl 3 as solvent. The reaction may also be carried out in another solvent E selected from an ester of an organic carboxylic acid, an alcohol, an ether, an amine, an ester of carbonic acid, a nitrile, a phosphoramide or an ester of phosphoric or phosphorous acid to produce the complex and an excess of POQ 3 added to the complex or to a solution thereof in the solvent E to replace the substituent E by POCl 3 . Exemplified is the preparation of MgTiCl 6 .5POCl 3 . |