Heterometallic lanthanide group 12 metal iodides

Area of Science:

• Inorganic Chemistry
• Materials Science
• Lanthanide Chemistry

Background:

• Lanthanide iodides are explored for applications in catalysis and materials.
• Understanding their reactivity with other metal halides is crucial for developing new compounds.

Purpose of the Study:

• To investigate the reactions between neodymium tri-iodide and Group 12 metal iodides (Zn, Cd, Hg).
• To characterize the resulting heterometallic compounds and understand their structural determinants.
• To explore the behavior of ytterbium tri-iodide under similar conditions.

Main Methods:

• Synthesis of heterometallic compounds by reacting neodymium tri-iodide with Group 12 metal iodides.
• Structural characterization of the synthesized compounds using X-ray diffraction.
• Investigation of ytterbium tri-iodide reactions in the presence of excess iodide and in pyridine solvent.

Main Results:

• Formation of ionic and charge-neutral heterometallic compounds, such as [(THF)(5)NdI(2)][MI(3)THF] and [(THF)(5)NdI(micro(2)I)HgI(3)].
• Structural variations are attributed to M-L bond strengths rather than Nd-L bonds.
• Ytterbium tri-iodide readily forms triiodide salts or iodide salts with pyridine, indicating facile iodide displacement.

Conclusions:

• The reactivity of lanthanide iodides with Group 12 metal iodides leads to diverse heterometallic structures.
• Metal-ligand bond strengths are key factors in determining the resulting compound structures.
• Lanthanide iodides are prone to iodide displacement, complicating their use as Lewis acid catalysts.