Computational NMR spectroscopy of ²⁰⁵ Tl

Area of Science:

• Inorganic Chemistry
• Computational Chemistry
• Physical Chemistry

Background:

• Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful tool for characterizing chemical structures.
• Thallium (Tl) compounds exhibit diverse chemical behaviors and coordination environments.
• Accurate prediction of NMR chemical shifts is crucial for structure elucidation and validation.

Purpose of the Study:

• To investigate the ²⁰⁵Tl NMR chemical shifts in a range of thallium compounds.
• To evaluate the performance of various computational methods for predicting these shifts.
• To establish a reliable computational protocol for structure/conformation analysis of thallium compounds.

Main Methods:

• Calculated ²⁰⁵Tl NMR chemical shifts using the ZORA relativistic method.
• Employed various functionals (BP86, PBE, B3LYP, PBE0) with and without spin-orbit coupling.
• Assessed the impact of solvent effects using the COSMO model.

Main Results:

• The ZORA-SO-PBE0 (COSMO) level of theory demonstrated excellent agreement with experimental ²⁰⁵Tl NMR chemical shifts.
• The computational protocol effectively distinguishes between possible structures and conformations.
• Calculated shifts correlate well with experimental values across different thallium compound types.

Conclusions:

• A highly accurate computational protocol for predicting ²⁰⁵Tl NMR chemical shifts has been developed.
• This method provides a reliable tool for structure determination and conformational analysis in thallium chemistry.
• The findings facilitate the interpretation of experimental NMR data for novel thallium-containing materials.