Jb. Lambert et al., PROTONATED DIGERMYL AND DISTANNYL ETHERS WITH PARTIAL GERMYLIUM AND STANNYLIUM ION CHARACTER, Journal of organometallic chemistry, 499(1-2), 1995, pp. 49-55
Hydrolysis of trimethylgermylium and triethylstannylium tetrakis(penta
fluorophenyl)borate produced respectively bis(trimethylgermyl)oxonium
and bis(triethylstannyl)oxonium tetrakis(pentafluorophenyl)borate, tha
t is, the protonated forms of bis(trimethylgermyl) ether and bis(triet
hylstannyl) ether. The crystal structures of both molecules respective
ly show increased Ge-O and Sn-O bond lengths and flattened tetrahedra
about germanium and tin. These structural features indicate pronounced
germylium and stannylium ion character.