Group VIA Derivatives

1 Occupancy weighted mean of the Ge—0 and M—O distances. d Electron-diffraction data. 

Bis(trimethylgermyl)sulfide has been coordinated to tungsten penta-carbonyl, and its structure determined (140). 

Three structures containing R Ge—Se bonds are known (148), namely cyclo-Ph8Ge4Se (Ge—Se 2.373 A), the six-membered ring (Ph2GeSe)3 (2.342-2.363 A), and the adamantyl (PhGe)4Se6 (2.339-2.360 A). 

Despite the mundane nature of the their molecular geometries, a number of interesting trends in both bond lengths and angles are discernible (Table V). 

The only reports of an organogermanium-iodine bond occur in the polygermane, I[(C6H5)2Ge]4I (58 see Section III,C) and the cyclic 1,4-digermacyclohexadiene, I2GeC4H4GeI2 (21, 178). The two reports offer Ge—I distances of 2.559 (21) and 2.48 A (178), respectively. 

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