Cyclo­penta­dienone triisocyanide iron complexes: general synthesis and crystal structures of tris­(2,6-di­methyl­phenyl isocyanide)(η(4)-tetra­phenyl­cyclo­penta­dienone)iron and tris­(naphthalen-2-yl iso­cyanide)(η(4)-tetra­phenyl­cyclo­penta­dienone)iron acetone hemisolvate

Irradiation of a toluene solution containing cyclo­penta­dienone tricarbonyl iron complexes and isocyanides with blue LEDs afforded the formation and isolation of 12 triisocyanide complexes, two of which, namely tris­(2,6-di­methyl­phenyl isocyanide)(η(4)-tetra­phenyl­cyclo­penatedienone)iron, [Fe(C(9)H(9)N)(3)(C(29)H(20)O)], and tris­(naphthalen-2-yl isocyanide)(η(4)-tetra­phenyl­cyclo­penatedienone)iron acetone hemisolvate, [Fe(C(11)H(7)N)(3)(C(29)H(20)O)](2)·C(3)H(6)O, could be characterized crystallographically. The air-stable compounds were purified by column chroma­tography and were characterized by (1)H NMR, (13)C NMR, elemental analysis and HRMS. NMR and XRD data indicate generally more electron-rich Fe(0) centers compared to the corresponding tricarbonyl compounds.