A simple, novel method for the preparation of metallophthalocyanines

New metallophthalocyanines (Me---Pc) in the crystalline form were synthesized by the direct reaction between the 1,2-dicyanobenzene and filings of the metallic elements or intermetallic alloys. The reaction took place at about 480 K in vacuum over a few days. Some remarks on the reaction mechanism of the Me---Pc formation are made. It is assumed that under the experimental conditions used the 1,2-dicyanobenzene liquid undergoes a catalytic tetramerization. The catalytic atom of the metal is simultaneously coordinated by the forming tetramer.