Manganese germylene hydride complexes: reactivity with carbon dioxide, benzophenone, and diisopropylcarbodiimide

Reactions of bis(hydrocarbyl)germylene manganese(I) hydride complexes [(dmpe)₂MnH(GeR₂)] (1a: R = Ph, 1b: R = Et) with carbon dioxide yielded the previously reported carbonyl formate complex [(dmpe)₂Mn(κ¹-O₂CH)(CO)] (3) via the unstable κ²-formatogermyl intermediates [(dmpe)₂Mn{κ²-GeR₂(OCHO)}] (5a: R = Ph, 5b: R = Et). By contrast, addition of CO₂ to [(dmpe)₂MnH(GeⁿBuH)] (2a), which contains a terminal GeH substitutent, resulted in the …