Angewandte Chemie International Edition
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Back Cover: Carbaborane-Substituted 1,2-Diphosphetanes (Angew. Chem. Int. Ed. 20/2011)
Endocyclic P-P bonds are found in carbaborane-substituted 1,2-diphosphetanes, which are obtained in high yield from diastereomeric mixtures of 1,2-bis(chlorophosphanyl)-1,2-dicarba-closo-dodecaboranes(12). In their Communication on page 4701 ff., E. Hey-Hawkins and co-workers show that the air- and water-stable racemic 1,2-diphosphetane depicted undergoes a ring-opening reaction with elemental iodine to give exclusively rac-1,2-bis(iodo-tert-butylphosphanyl)-1,2-dicarba-closo-dodecaborane(12).