Chemistry Letters, Vol.42, No.8, 807-809, 2013
C(sp(3))-N(sp) Bond Cleavage of Isocyanides at a Cationic [CCH] Subunit in a Bisdisphenoidal Eight-atom Tetrairon-Tetracarbon Cluster
Reaction of [(eta(5)-C5H4Me)(4)Fe-4(HCCH)(HCC-NC4H4N)](PF6)(2) (1) with tert-butyl isocyanide led to C(sp(3))-N(sp) bond activation to give [(eta(5)-C5H4Me)(4)Fe-4(HCCH)(HCC-CN)](PF6) (2). The resulting tert-butyl cation was trapped as the adduct with pyrazine. Reactions of 1 with 2,6-dimethylphenyl isocyanide and cyclohexyl isocyanide led to the coordination of the isocyanides to the cationic [CCH] subunit. Thermolysis of [(eta 5-C5H4Me)(4)Fe-4(HCCH)(HCC-CNCY)]PF6)(2) (6) yielded 2.