Complex compounds of platinum with diallylamine

Summary

• 1. The action of diallylamine on ammonium chloroplatinate (II) in neutral medium has been studied and it has been shown that the monomer DCl₂Pt and the dimer [D₂Pt][PtCl₂] are formed. In those compounds diallylamine occupies two coordination positions and forms a ring.

• 2. The view is expressed that diallylamine, in forming a ring with the platinum, unites through the nitrogen of the NH group and the double bond.

• 3. It has been shown that thiourea reacts with Dcl₂Pt with formation of DThio₂PtCl₂, so confirming the stability of the diallylamine ring. The preparation of mixed ammonia-diallylamine compounds is also an indication of the stability of the diallylamine ring.

• 4. The action of concentrated HCl on DCl₂Pt has been studied, and it has been shown that the ring may be opened with formation of the compound HDCl₂Pt. in which diallylamine occupies one coordination position. A study of the reaction of this compound with thiourea has shown that diallylamine, when occupying one coordination position, is readily eliminated from the inner sphere with formation of the compound Thio₄PtCl₂.

• 5. The reaction of diallylamine with chloroplatinates (II) in acid medium has been studied. It has been shown that a compound HDCl₂Pt is obtained which is identical with the compound HDCl₂Pt obtained by boiling DCl₂Pt with concentrated HCl.

• 6. The reaction conditions havebeen found under which the re-closure of the ring occurs in the compound HDCl₂Pt.