(SUPERMESITYL)CHLOROGERMYLENE (SUPERMESITYL = TBU3C6H2) - SYNTHESIS AND DERIVATIZATION TO (SUPERMESITYL)FERRIOGERMYLENES

GeCl2.(dioxane) (1) reacts at low temperatures with stoichiometric amo unts of (2,4,6-tri-tert-butylphenyl)lithium to give the unsymmetricall y substituted (supermesityl)chlorogermylene (2), which is stable at am bient temperature. The monomeric structure of 2 has been proven both i n solution and in the solid state. 2 is a suitable substrate for the s ynthesis of mixed germylenes. Thus, reaction of 2 with CpLi leads to the germylene MesGeCp* (3), whereas the reaction with the correspondi ng alkali-metal metalates yields the first organometallogermylenes, Me sGeFe(CO)2R (4, R = Cp*; 5, R = Cp).