Despite the observation that 2 is inert toward further reaction with CO, addition of alternative electrophiles demonstrate that the remaining hydride of this complex is still nucleophilic and is the preferential site for onwards reaction. Addition of 2 to either benzophenone or 2,6dimethylphenyl isocyanate led to the formation of 3a and 3b respectively (Figure ). The acetaldehyde enolate remains intact throughout these reactions and no further C-C bond formation e.g. to form C3 chains is observed. 3a was characterised by a diagnostic resonance at H = 5.39 ppm corresponding to the new methine environment of the carbinol anion, while 3b demonstrates a downfield resonance at H = 8.17 ppm assigned to the new metalated imine fragment.