A list of all the posts and pages found on the site. For you robots out there is an XML version available for digesting as well.


About me


UV-Vis Spectra from ORCA

5 minute read


I’ve been using TD-DFT to simulate some UV-Vis spectra for a collaborator, and wanted to understand what ORCA’s orca_mapspc utility is actually doing.Here’s how to plot exactly the same spectrum as orca_mapspc.

Obtaining pseudospin-1/2 g-values from crystal field wavefunctions

9 minute read


Pseudospin Hamiltonians and wavefunctions are often employed in the single-molecule-magnet and qubit literature as a means of describing a small subset of a much larger group of states. Here I’ll cover how you can obtain pseudospin 1/2 g-values which describe a set of crystal field states.

Plotting theoretical infrared spectra

5 minute read


I recently had to plot some theoretical infrared spectra using the output of a DFT optimisation and frequency calculation performed in Gaussian and didn’t want to have to plot everything in Gaussview. Here’s how to plot exactly the same spectrum as Gaussview, and hopefully a clear explanation of what Gaussian means by IR Intensities.

Setting up an X11 Server on WSL2

less than 1 minute read


A set of instructions for setting up an X11 server for the Windows Subsystem for Linux (WSL2).