[Sc<sub>2</sub>(μ-OH)<sub>2</sub>(H<sub>2</sub>O)<sub>6</sub>(NO<sub>3</sub>)<sub>2</sub>](NO<sub>3</sub>)<sub>2</sub>: Aqueous Synthesis and Characterization
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Abstract
[Sc<sub>2</sub>(μ-OH)<sub>2</sub>(H<sub>2</sub>O)<sub>6</sub>(NO<sub>3</sub>)<sub>2</sub>](NO<sub>3</sub>)<sub>2</sub> has been synthesized from an aqueous scandium nitrate solution by
using zinc powder as a reducing agent for nitric acid, which drives
an increase in pH and forces the condensation of aqua scandium cations.
This preparative route readily produces gram-scale samples with yields
near 65%. A single-crystal X-ray diffraction study reveals a structure
characterized by a hydroxo-bridged Sc dimer. The FTIR spectrum of
the compound has been modeled via ab initio computations, allowing
the identification of signature IR peaks. Some initial observations
on the thermal transformation of the compound to Sc<sub>2</sub>O<sub>3</sub> are also reported
