With germanium-oxygen bonds

The addition of mesityl nitrile oxide to stable derivatives of a germanethi-one21 and a germaneselone22 is closely related to the addition of nitrones. The reaction is regioselective again, with formation of the germanium-oxygen bond. 

The kinetics of the reaction of germanium with dissolved oxygen can be related to the surface structure. Thus it was found (2) that the dissolution rates for the three principal low-index planes vary in the order of the densities of dangling bonds as shown in Fig. 4 and Table I. It was speculated that the intermediates Ge-OH and Ge-C H are formed on the surface during dissolution. Orientation effects have also been observed in fast etching media (4), although high rates usually mask relatively small differences due to orientation. 

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