in benzene byproducts: CO, Fe2(CO)9, germylene carbene; Irradiation (UV/VIS); (CH3)2GeCH2Ge(CH3)2Fe(CO)4 in C6H6 irradiated in a quartz tube (Hg lamp, 20h); determination of content: GC, 1H-NMR, MS and IR, not isolated;

in benzene Irradiation (UV/VIS); (CH3)2GeCH2Ge(CH3)2Fe(CO)4 and (CH3)3GeH in C6H6 irradiated in a quartz tube (Hg lamp, 20h); determination of content: 1H-NMR, GC-MS, not isolated;

With  bromine in  benzene  reaction of bis(dimethylgermyl)methane-iron tetracarbonyl and Br2 in C6H6 at 20°C; identified by GC (coinjection with autenthic samples) and 1H-NMR;