“…Reflux of 76 with ethanol in the presence of di-chloromethane245 afforded a product with an expanded 10-membered intercage ring, 7,7':8,8,-(SCH2S)2-[7,8-C2B9H10][7/,8/-C2B9H10] (simplified structure 78). The Bo rt"CHrs-c 78 same authors246,247 have also built up exomacropolycyclic rings on the 74 moiety from a general reaction involving 1,2-(HS)2-1,2-C2B10H10 as a starting material at high dilution of the reagents:(HS)2C2B10H10 + 3EtOH + 30H-+ C1CH2(CH20CH2)"CH2C1 -2CT + B(OEt)3 + [CH2(CH2OCH2)"CH2S2C2B9H10]-+ 3H20 + H2(31)…”