Synthese, Spektren und Strukturen einfacher Derivate des Tris(bis(trimethylsilyl)methyl)indiums, In(CH(Si(CH3)3)2)3

Like trimethyl- or triethylindium tris(disyl)indium, In(CH(SiMe3)(2))(3) (Delta InR3) also reacts with equimolar amounts of water, D2O, MeOH, HCl and HCOOH, respectively, in ether solution at room temperature to form the corresponding alkane, here (Me3Si)(2)CH2, and the simple monosubstitution products R2InX. With the dibasic oxalic and sulfuric acid the multinuclear derivatives (R2In)(2)C2O4 and [RIn(R2In)(2)(SO4)(2)](2) are formed, respectively. The halogenides R2InCl, RInCl2, and RInBr2 have been prepared by metathesis from InHal(3) and InR3 (molar ratios 1:2 and 2:1). The H-1, C-13 and Si-29 NMR- as well as the vibrational spectra (IR, Raman) are discussed. According to the X-ray structure elucidations the monosubstitution products R2InX (with X = OH, OMe, Cl) are dimeric in the solid state and consist of planar, centrosymmetric fourmembered In2X2 skeletons. The dibromide RInBr2 forms a polymeric chain structure with five-fold co-ordinated metal centres and vertex linked, alternately appearing planar as well as slightly folded In2Br2-moities. The "sesquisulfate" [R5In3(SO4)(2)](2) has an uncommon, cage-like structure with four as well as five-fold co-ordinated In atoms. The structural data could not be optimally refined due to the highly disordered disyl groups.