A SPECTROMETRIC AND CONDUCTOMETRIC STUDY OF THE REACTION OF IMIDAZOLINE-2-SELONE DERIVATIVES WITH BROMINE - CRYSTAL-STRUCTURE OF ETHYL-4-IMIDAZOLIN-2-YLIUMDIBROMOSELENANIDE)ETHANE

The oxidative addition of Br-2 to the imidazoline-2-selone derivatives la-e has been studied by spectrophotometric and conductometric techni ques. The experimental results clearly indicate that this reaction inv olves the dications 2a-c, containing an Se-Se bond, as intermediates i n the formation of the hypervalent 10-Se-3 selenium compounds 3a-e con taining the Br-Se-Br group. The crystal structure of 1,2-bis(3-methyl- 4-imidazolin-2-ylium dibromoselenanide)ethane (3c), a new stable hyper valent 10-Se-3 compound, is also reported.