Molecular orbital theory book reccomenations

[etotheipi]

Hey guys, I decide I need to learn the mathematics of molecular-orbital theory, to build on the qualitative approach of my chemistry coursee. To do this I also first need to study single-electron systems and then many-electron systems, the Born-Oppenheimer approximation, and relevant topics therein.

I'm not really in a position to buy a textbook right now, so I hoped someone would be able to suggest a free online resource which will cover these? But if anyone recommends a nice textbook then I'll be very pleased to look into that as well, though I won't be able to try and borrow it for at least a few weeks [and I'd quite like to get started on something tomorrow!].

Thanks!

 

[Mayhem]

Atkins seems to cover several of these topics and it is often considered to be the physical chemistry textbook.

 

[penta-d]

Sorry I don't know of any websites to recommend, but you might take a look at Szabo - Modern Quantum Chemistry: Introduction to Advanced Electronic Structure Theory. It is a Dover publication, so should be very affordable.

 

[etotheipi]

Interesting! Atkins looks great, but it might be a little overkill to splash out on such a beast of a textbook right now. I hadn't heard of Szabo, but that looks fun too. I need to check if either is available to borrow. Thanks for the suggestions