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Two dinuclear metal complexes bearing the purine derivative 7-methyl-6-furylpurine ( 1b ) as a ligand are reported. In [Ag 2 ( 1b ) 2 (DMSO) 2 ](ClO 4 ) 2 ·DMSO and [Cu 2 ( 1b ) 2 (NO 3 ) 2 ], two bridging purine derivatives coordinate the two metal ions via their N3 and N9 positions. In the silver(I) complex, the coordination environment of each metal ion is completed by a DMSO ligand, whereas an additional nitrato ligand coordinates to each copper(I) ion. The intramolecular Ag···Ag distance of 3.1069(5) Å is in agreement with the presence of a weak argentophilic interaction, whereas the Cu···Cu distance of 2.9382(4) Å is too long to be indicative of a cuprophilic interaction. The compounds represent the first examples of dinuclear complexes comprising two N3,N9-bridging purine derivatives without any additional bridging ligand.

7-Methyl-6-furylpurine forms dinuclear metal complexes with N3,N9 coordination