Formation and crystal structure of bis-(2,2,6,6-tetramethylpiperidino)diselane

The reaction of N-lithioselenido-2,2,6,6-tetramethylpiperidine and trimethyltin chloride leads to the formation of hexamethyldistannane and bis-(2,2,6,6-tetramethyl-piperidino)diselane. This compound was identified by 1H and 13C NMR, by mass spectrometry and elemental analysis. The crystal structure was also determined showing a conformation differing from other diaminodiselanes due to the repulsion of the bulky 2,2,6,6-tetramethyl-piperidino groups.