With the intention of obtaining uncommon head-to-head anthracene dimers, double salts of 9-anthracenecarboxylic acid (9-AC) with several diamines were photolyzed in the solid state. 9-AC underwent decarboxylation and reduction as well as dimerization. Although the head-to-tail dimer and an unsymmetrical dimer were obtained, the head-to-head one was not produced.