ORGANORUTHENABORANE CHEMISTRY .8. REACTIONS OF [((ETA-6-C6ME6)RUCL2)2] AND [((ETA-6-MEC6H4IPR)RUCL2)2] WITH CS[ARACHNO-6-SB9H12] - ISOLATION OF 10-VERTEX, 11-VERTEX, AND 12-VERTEX RUTHENATHIABORANES AND THEIR CHARACTERIZATION BY NMR-SPECTROSCOPY

Reaction of [{(eta-6-C6H6)RuCl2}2] with arachno-[6-SB9H12]- and NaH in CH2Cl2/acetone solution gives a low yield (1.3%) of a closo ten-vertex ruthenathiaborane formulated as [2-(eta-6-C6Me6)-closo-2,1-RuSB8H8] whereas reaction of the p-cymene analogue [{(eta-6-MeC6H4iPr)RuCl2}2] with arachno-[6-SB9H12]- and N,N,N',N'-tetramethylnaphthalene-1,8-diamine (tmnd) in acetone yields nido-eleven-vertex and closo-twelve-vertex ruthenathiaboranes of proposed formulations [11-Cl-7-(eta-6-MeC6H4iPr)-nido-7,8-RuSB9H10] (2.2%), [2,3-(eta-6-MeC6H4iPr)2-closo-2,3,1-Ru2SB9H9] (21%), and [7-Cl-2,3-(eta-6-MeC6H4iPr)2-closo-2,3,1-Ru2SB9H8] (8%). The products are all air-stable red or yellow solids and their characterization made use of nuclear magnetic double resonance and two-dimensional correlation n.m.r. spectroscopy (COSY).