Selective Functionalization of Carbonyl Closo -Decaborate [2-B 10 H 9 CO] - with Building Block Properties via Grignard Reagents.

A green, fast and selective approach for the synthesis of mono-substituted closo -decaborate derivatives [2-B 10 H 9 COR] 2- has been established via a nucleophilic addition reaction between the carbonyl derivative of closo -decaborate [2-B 10 H 9 CO] - and the corresponding Grignard reagent RMgX, where R is the ethyl, iso-propyl, pentyl, allyl, vinyl and propynyl groups. This approach is accomplished under mild conditions with 70-80% yields. The significance of these derivative is their ability to constitute building blocks for polymeric integration via the allyl, vinyl and propynyl substituents. All products were characterized by 11 B, 1 H and 13 C NMR, elemental analysis and mass spectrometry.