Azides of Germanium and Tin

As electro positivity increases, the azides of the heavier IV A elements shift toward a more hydrophile behavior. This pattern is qualitatively noticeable in the triorganyl element azides (see Table XFV for trimethyl compounds). The triphenyl compounds display a similar behavior [9,261,272]. Basically, all R3E1(N3) compounds are accessible from the respective chloro compounds and sodium azide in ether/water media [273]. 

In the hexaazidostannate(IV), [Sn(N3)6] , the first IVA azido complex appears. In spite of six azido groups, the complex is not very sensitive. The sodium salt deflagrates when shocked thermally but is stable to impact [275] its salts with large organic cations are stable to both stimuli [158,222,228]. There are also known two mixed tin azides, ClSn(N3) [132] and Cl2Sn(N3)2 [271], which are white, hydrolysis-sensitive soHds with explosive properties. 

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