On the Nature of Bridging Metal Atoms in Intermetalloid Clusters: Synthesis and Structure of the Metal‐Atom‐Bridged Zintl Clusters [Sn(Ge9)2]4− and [Zn(Ge9)2)]6− |
| |
| Authors: | Manuel M Bentlohner Laura‐Alice Jantke Thomas Henneberger Christina Fischer Kerstin Mayer Dr Wilhelm Klein Prof?Dr Thomas F Fässler |
| |
| Affiliation: | Department Chemie, Technische Universit?t München, Garching, Germany |
| |
| Abstract: | The addition of Sn and Zn ions to Ge9] clusters by reaction of Ge9]4? with SnPh2Cl2, ZnCp*2 (Cp*=pentamethylcyclopentadienyl), or Zn2HC(Ph2P=NPh)2]2 is reported. The resulting Sn‐ and Zn‐bridged clusters (Ge9)M(Ge9)]q? (M=Sn, q=4; M=Zn, q=6) display various coordination modes. The M atoms that coordinate to the open square of a C4v‐symmetric Ge9] cluster form strong covalent multicenter M?Ge bonds, in contrast to the M atoms coordinating to triangular cluster faces. Molecular orbital analyses show that the M atoms of the Ge9M fragments coordinate to a second Ge9] cluster with similar orbitals but in different ways. The Ge9Sn]2?unit donates two electrons to the triangular face of a second Ge9]2? cluster with D3h symmetry, whereas Ge9Zn]2?acts as an electron acceptor when interacting with the triangular face of a D3h‐symmetric Ge9]4? unit. |
| |
| Keywords: | germanium metal– metal interactions tin zinc Zintl anions |
|
|
