Dizinc
Cation [Zn<sub>2</sub>]<sup>2+</sup> Trapped
In A Homoleptic Metalloid Coordination Environment Stabilized by Dispersion
Forces: [Zn<sub>2</sub>(GaCp*)<sub>6</sub>][BAr<sub>4</sub><sup>F</sup>]<sub>2</sub>
- Publication date
- Publisher
Abstract
The
synthesis and characterization of the cationic mixed metal Ga/Zn cluster
[Zn<sub>2</sub>(GaCp*)<sub>6</sub>]<sup>2+</sup> (<b>1</b>)
is presented. The reaction of [Zn<sub>2</sub>Cp*<sub>2</sub>] with
[Ga<sub>2</sub>Cp*][BAr<sub>4</sub><sup>F</sup>] leads to the formation
of the novel complex being the first example of a [Zn<sub>2</sub>]<sup>2+</sup> core exclusively ligated by metalloid group-13 organyl-ligands.
Compound <b>1</b> exhibits two different coordination modes:
In the solid state, two of the six GaCp* ligands occupy bridging positions,
whereas VT <sup>1</sup>H NMR indicates the coexistence of a second
isomer in solution featuring six terminal GaCp* ligands. Quantum chemical
calculations have been carried out to assign the gallium and zinc
positions; the bonding situation in <b>1</b> is characterized
and the importance of dispersion forces is discussed
