(2,2-Dimethyl-2H-benzimidazol)-kupfer(I)-perchlorat-Komplexverbindungen

(2,2-Dimethyl-2H-benzimidazole)-copper (I) Perchlorate Complexes Reaction of bis(o-phenylenediamine)copper(II) perchlorate with acetone yields (2,2-dimethyl-2H-benzimidazole)-copper(I) perchlorate 1 . This complex gives with aceto- and benzonitrile the deeply coloured compounds C₆H₄N₂C(CH₃)₂. CuClO₄ · 2 RCN (R = CH₃, C₆H₅). o-Phenylendiaminemonohydrochloride reacts with acetone to 2,2,4-trimethyl-1H-2,3-dihydrobenzo[b]1,4-diazepine-hydrochloride; KOH yields the free base 2 . The presence of 2,2-dimethyl-2H-benzimidazole in the primary Cu-complex and the structure of 2 are proved by ¹H- and ¹³C-NMR-spectra.