Reactivity of the metal–metal bond in trimethylstannylpentacarbonylmanganese
Abstract
Reaction between Me3SnH and Mn2(CO)10 affords Me3SnMn(CO)5(I), but in much poorer yield than other established routes. Unlike its trimethylsilyl analogue, (I) is unaffected by water, methanol, and also aqueous NaOH. Cleavage of the tin–manganese bond occurs quantitatively with 1,2-dibromoethane and HgCl2, and with RHgX(R = Me or Ph; X = Cl or Br) to give products dependent on R and X. With CF3COCl and HSiCl3, displacement of one methyl group from tin occurs yielding Me2ClSnMn(CO)5(II), whereas SnCl4 successively cleaves all three tin–carbon bonds. In the Raman spectrum of (II), ν(Sn–Mn) is at 194 cm–1, compared with 178 cm–1 for (I).