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).