Diimino-carbene-supported germylone dimNHCGe does not react with BPh and does not activate dihydrogen in the FLP mode in the combination with this borane. However, it reacts with B(C F ) to give the zwitterionic borate dimNHCGe-(C F )BF(C F ) . This compound can be converted into the hydroborate dimNHCGe-(C F )BH(C F ) (8) and further into [dimNHCGe-(C F )B(C F ) ] (4). Compound 4 is a Ge/B analogue of Stephan's FLP parent P/B compound (C H Me ) P-C F -B(C F ) but unlike the latter cannot split dihydrogen. Moreover, attempts to prepare a Ge/B analogue of the zwitterion (C H Me ) HP-C F -BH(C F ) by protonation of borate 8 resulted in immediate elimination of H
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