Patent ID: 7999116

Claim:
A process for preparing a compound according to the reaction [M II (H 2 O) 6 ]D 2 +R(A)→[M II (A) R (H 2 O) 6-R (D) X ](D) 2-X M is selected from the group consisting of (1) cobalt, (2) copper, (3) iron, (4) manganese, (5) nickel, and (6) zinc; A is DAT; D is selected from the group consisting of (1) ClO 4 − , (2) NO 3 − , and (3) Cl − ; R is 5 or 6; and X is 0 or 1; and R+X=6 as follows: (1) mixing a chosen quantity of a metal salt [M II (H 2 O) 6 ]D 2 and R molar equivalents of A in a suitable solvent, thereby forming a solution; (2) heating said solution at a time and temperature suitable for the color of said solution to change; (3) cooling said solution to room temperature to form a precipitate of the compound; and (4) filtering the precipitate of the compound.