Carborane derivatives with boron-tin bond

Synthesis, Structure, and Spectroscopy of the Biscarboranyl Stannylenes (bc)Sn·THF and K2[(bc)Sn]2 (bc = 1,1′(ortho-Biscarborane)) and Dibiscarboranyl Ethene (bc)CH═CH(bc)

“…Unlike the rarity of bis-carboranyl group 14 complexes, several ortho - and meta -carboranes containing B–Sn and C–Sn bonds are known. , The earliest reports in 1965 concerned the trialkylcarboranyl tin complexes (C 2 B 10 H 10 )­(SnR 3 ) 2 , (R = alkyl), with each carbon vertex of the carborane cage bonded to a Sn­(IV) atom, although structural data was not provided . The first isolable carboranyl tin structures were the organotin complexes [ o -C 2 B 10 H 10 (CH 2 NMe 2 )­SnR 2 Br (R = Me or Ph; X = Cl or Br) which feature a Sn­(IV) bonded to a carbon vertex and stabilized by a Lewis basic −CH 2 NMe 2 chelating group (Table and ref ) .…”

“…The first isolable carboranyl tin structures were the organotin complexes [ o -C 2 B 10 H 10 (CH 2 NMe 2 )­SnR 2 Br (R = Me or Ph; X = Cl or Br) which feature a Sn­(IV) bonded to a carbon vertex and stabilized by a Lewis basic −CH 2 NMe 2 chelating group (Table and ref ) . In general, the majority of the tin-carborane complexes are achieved through an initial lithiation step in the stannylation of the C–H vertices of the carboranes cages. ,− …”