Germyl anions metal carbonyls

The Ge-Ge bond can undergo cleavage in reactions with [Bu4N]F to yield metal-free germyl anions, which can be employed in subsequent reactions with alkyl halides (Equation (210), Table 27) and carbonyl species (Equation (211), Table 28).266... 

We have discussed the direct formation of anions by reaction of silyl- or germyl-lithiums with metal carbonyls (cf. Sect. 2.12) ... 

Phosphonium salts of anionic trihydridogermyl metal carbonyl complexes for V, Nb, Cr, Mo, W, Mn, Re, Co and Ni have been synthesized by substitution of carbonyl group with trihydrido germane, —GeH3 " (equation 9). Hydridogermyl metal complexes are the precursors for metal germylenes and polynuclear metal germyl complexes . 

Reaction of the chiral anion with metal carbonyls provided a general route to optically active germyl-metal carbonyl anions (eq. [17]). 

---