RESEARCH USE
Where xTB fits
Start from coordinates with an explicit charge and number of unpaired electrons, choose a GFN-xTB or GFN-FF method, and run single-point, geometry, frequency, or dynamics calculations as appropriate. Record the method and version, solvent model, temperature, constraints, convergence settings, threads, and all input and output. Benchmark geometries and energy rankings on related known systems before scaling up.
Research tasks
- Optimize molecular geometries and estimate relative energies
- Run semiempirical frequency and molecular-dynamics calculations
- Prescreen structures and conformers for higher-level calculations
What to evaluate before use
- xTB methods trade cost for approximation, and accuracy varies across elements, bonding patterns, charge states, and properties. They are not universal high-accuracy quantum-chemistry references.
- The method, solvent model, and starting structure can change rankings. Transition metals, bond making or breaking, and unusual electronic structures require independent validation.
Verification note
This entry summarizes the resource's role without assessing scientific accuracy or endorsing its outputs. Features and terms can change; consult the official source before adopting it for consequential work.
semiempirical quantum chemistrytight binding
Last verified: 2026-09-19
Source: official documentation ↗