Similar "Metallo"-Diels-Alder reactions of (phenyl)acetylene with an ylide-like NHGe have been reported by the Driess group, yielding the respective bicyclo[2,2,2]octane adducts alongside the terminal C-H activation products (Scheme 1, b). We propose that the latter is not observed for our system due to lower basicity of the methine positions of 4 compared to the diketiminate-based ylide. For the Driess system, reaction of the NHGe with diphenylacetylene does not take place, even at elevated temperatures, which was attributed to increased steric strain of the system. We propose that the discrepancy in observed reactivity between the two systems is influenced by two factors: the decreased steric strain around the Ge centre due to the presence of only one dipp substituent in 4 and the higher nucleophilicity of the methine carbon of the NHGe.