Аннотация:The reaction of 9-iodo-ortho-carborane with n-butylmagnesium bromide affords 9-n-butyl-ortho-carborane. The reaction of the latter with alkali in boiling ethanol gives new nido-carborane [5-Bu-7,8-C2B9H11]– (I) containing the n-butyl substituent at the lower rim of the basket. The reaction of compound I with RuCl2(PPh3)(Ph2P(CH2)4PPh2) results in the formation of the corresponding ruthenium(IV) closo-complex 3,3-(Ph2P(CH2)4PPh2)-3-H-3-Cl-9-Bu-closo-3,1,2-RuC2B9H10 (II) characterized by 2D NMR spectroscopy. On heating compound II can react with carbon tetrachloride to form the 17-electron complex 3,3-(Ph2P(CH2)4PPh2)-3-Cl-9-Bu-closo-3,1,2-RuC2B9H10 (III). The structure of complex III is solved by X-ray diffraction (XRD) (CIF file CCDC no. 2180761). The electrochemical studies show that complex III undergoes the reversible transition Ru(II) → Ru(III) similarly to the earlier studied ruthenacarboranes.
