Another example is a solution of trimethyl aluminium in an ether solvent ( such as THF ), similar chemistry should be expected for a triaryl or trialkyl borane.
2.
I guess a useful reaction might be mixing a straight-chain alkene, an ether with tertiary alkyl groups and the strong acid with a poor nucleophile conjugate base; the ether solvent binds to the carbocation and expels one tertiary alkyl group.
3.
Alternatively, nitroethane can be produced by the Victor Meyer reaction with either bromoethane or iodoethane with silver nitrite in a diethyl ether solvent or with the Kornblum Modification which uses the prior mentioned alkyl halides with the less soluble sodium nitrite salt in either a dimethyl sulfoxide or dimethylformamide solvent.
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