X-ray analysis of phthalocyanines formed in the reaction of Au-Cu and Au-Sn alloys with 1,2-dicyanobenzene

Article abstract of DOI:10.1016/0925-8388(92)90054-D

X-ray investigations of the reactions of copper, tin and their alloys with gold, with 1,2-dicyanobenzene at 210°C have been performed. It was found that under the conditions used, gold does not take part in the reaction with 1,2-dicyanobenzene, but separates from the alloys. Copper and tin phthalocyanines are formed as the main products of the above reactions. The crystal structure of tin phthalocyanine (SnPC) has been determined. SnPc crystallizes in the triclinic system (a = 12.048(3) A, b = 12.630(3) A, c = 8.671(3) A, α = 95.85(5)°, β = 95.10(5)°, γ = 68.25(5)°), space group P1, Z = 2. The refined structure with anisotropic temperature factors have R = 0.041. The Sn atom is coordinated by four isoindole N atoms, the average Sn-N distance being 2.267(6) A. The SnPc molecule is not planar. The Sn atom is 1.1286 A out of the plane of the four coordinating N atoms.