extension. A standard input file follows this specific structure: Gaussian.com Description Example Content Commands for memory and file naming %chk=molecule.chk Defines the method and basis set # B3LYP/6-31G(d) Opt Freq A brief name for the calculation Optimization of Water Charge/Mult Net charge and spin multiplicity Atomic coordinates (XYZ or Z-matrix) O 0.0 0.0 0.0 (and hydrogens) Important Formatting Rules: Blank Lines

Pricing varies by region and user type. For example, a single computer academic license for Windows may cost around $750 in the US , while commercial licenses are significantly higher.

Test installation: