Method for the preparation of a polyhalogeno metal complex compound

A method for the preparation of an ionic polyhalogeno metal complex compound represented by the general formula

• ›R.sub.4 N!.sup.+ ›M.sup.I X.sub.2 !.sup.-,
• in which each R is, independently from the others, an alkyl group, M.sup.I is an atom of a metal having an atomic valency of 1 and a coordination number of 2 and X is an atom of a halogen, which comprises the steps of:
• (a) dissolving, in an organic solvent, a tetraalkylammonium halide ›R.sub.4 N!.sup.+ X.sup.- and elementary halogen X.sub.2 in substantially equimolar amounts calculated as the halogen atoms to form a solution;
• (b) adding, to the solution, an elementary form of the metal M.sup.I in an at least equimolar amount to the tetraalkylammonium halide to be dissolved in the solution forming an ionic complex compound in the reaction mixture;
• (c) removing the undissolved portion of the metal from the reaction mixture to give a solution of the ionic polyhalogeno metal complex compound;
• and
• (d) removing the organic solvent from the solution obtained in step (c).

A method for the preparation of an ionic polyhalogeno metal complex compound represented by the general formula

• ›R.sub.4 N!.sup.+ ›M.sup.III X.sub.4 !.sup.-,
• in which each R is, independently from the others, an alkyl group, M.sup.III is an atom of a metal having an atomic valency of 3 and a coordination number of 4 and X is an atom of a halogen, which comprises the steps of:
• (a) dissolving, in an organic solvent, a tetraalkylammonium halide ›R.sub.4 N!.sup.+ X.sup.- and elementary halogen X.sub.2 in a molar proportion substantially equal to 1:3 calculated as the halogen atoms to form a solution;
• (b) adding, to the solution, an elementary form of the metal M.sup.III in an at least equimolar amount to the tetraalkylammonium halide to be dissolved in the solution forming an ionic complex compound in the reaction mixture;
• (c) removing the undissolved portion of the metal from the reaction mixture to give a solution of the ionic polyhalogeno metal complex compound;
• and
• (d) removing the organic solvent from the solution obtained in step (c).

A method for the preparation of an ionic polyhalogeno metal complex compound represented by the general formula

• ›R.sub.4 N!.sup.+.sub.2 ›M.sup.II X.sub.4 !.sup.2-,
• in which each R is, independently from the others, an alkyl group, M.sup.II is an atom of a metal having an atomic valency of 2 and a coordination number of 4 and X is an atom of a halogen, which comprises the steps of:
• (a) dissolving, in an organic solvent, a tetraalkylammonium halide ›R.sub.4 N!.sup.+ X.sup.- and elementary halogen X.sub.2 in substantially equimolar amounts calculated as the halogen atoms to form a solution;
• (b) adding, to the solution, an elementary form of the metal M.sup.II in an amount of at least 0.5 mole per mole of the tetraalkylammonium halide to be dissolved in the solution forming an ionic complex compound in the reaction mixture;
• (c) removing the undissolved portion of the metal from the reaction mixture to give a solution of the ionic polyhalogeno metal complex compound;
• and
• (d) removing the organic solvent from the solution obtained in step (c).

A method for the preparation of an ionic polyhalogeno metal complex compound represented by the general formula

• ›R.sub.4 N!.sup.+.sub.2 ›M.sup.II.sub.2 X.sub.6 !.sup.2-,
• in which each R is, independently from the others, an alkyl group, M.sup.II is an atom of a metal having an atomic valency of 2 and a coordination number of 4 and X is an atom of a halogen, which comprises the steps of:
• (a) dissolving, in an organic solvent, a tetraalkylammonium halide ›R.sub.4 N!.sup.+ X.sup.- and elementary halogen X.sub.2 in a molar proportion substantially equal to 1:2 calculated as the halogen atoms to form a solution;
• (b) adding, to the solution, an elementary form of the metal M.sup.II in an at least equimolar amount to the tetraalkylammonium halide to be dissolved in the solution forming an ionic complex compound in the reaction mixture;
• (c) removing the undissolved portion of the metal from the reaction mixture to give a solution of the ionic polyhalogeno metal complex compound;
• and
• (d) removing the organic solvent from the solution obtained in step (c).