Pentacarbonylmanganese complexes of indium
Abstract
The preparation of In[Mn(CO)5]3, XIn[Mn(CO)5]2, and X2InMn(CO)5(X = Cl or Br) is described and their i.r. and mass spectra are discussed. The In–Mn bonds are readily cleaved by halogens and hydrogen halides to form XIn[Mn(CO)5]2, X2InMn(CO)5, or InX3 depending on the stoicheiometry of the reactants. In acetone or methanol solution the complexes XIn[Mn(CO)5]2 and X2InMn(CO)5 undergo redistribution reactions to give In[Mn(CO)5]3 and InX3. In acetonitrile solution, however, all the complexes X3-nIn[Mn(CO)5]n ionise to give the cation [(MeCN)2InMn2(CO)10]+ which has been isolated as its perchlorate salt. The interaction of halide ions with the indium complexes gives anionic halide derivatives such as R4N+{X4-nIn[Mn(CO)5]n}–(n= 1–3; R = Me, X = Cl; R = Et, X = Br) which also ionise in acetonitrile to yield the cation [(MeCN)2InMn2(CO)10]+.