Syntheses, spectra, and structures of simple derivatives of tris(bis(trimethylsilyl)methyl) indium, In(CH(Si(CH3)(3))(2))(3)

Like trimethyl- or triethylindium tris(disyl)indium, In(CH(SiMe3)(2))(3) (D elta InR3) also reacts with equimolar amounts of water, D2O, MeOH, HCl and HCOOH, respectively, in ether solution at room temperature to form the corr esponding alkane, here (Me3Si)(2)CH2, and the simple monosubstitution produ cts R2InX. With the dibasic oxalic and sulfuric acid the multinuclear deriv atives (R2In)(2)C2O4 and [RIn(R2In)(2)(SO4)(2)](2) are formed, respectively . The halogenides R2InCl, RInCl2, and RInBr2 have been prepared by metathes is 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. Accor ding to the X-ray structure elucidations the monosubstitution products R2In X (with X = OH, OMe, Cl) are dimeric in the solid state and consist of plan ar, centrosymmetric fourmembered In2X2 skeletons. The dibromide RInBr2 form s a polymeric chain structure with five-fold co-ordinated metal centres and vertex linked, alternately appearing planar as well as slightly folded In2 Br2-moities. The "sesquisulfate" [R5In3(SO4)(2)](2) has an uncommon, cage-l ike structure with four as well as five-fold co-ordinated In atoms. The str uctural data could not be optimally refined due to the highly disordered di syl groups.