Quantum Chemistry, 2nd edition : University Science Books : 9781891389504 : 1891389505 : 31 Oct 2007 : Still a best-selling text after a remarkable twenty-four years in print, Don McQuarrie has updated his landmark Quantum Chemistry into a keenly anticipated second edition. Perhaps the biggest change in the years since the first edition appeared is the proliferation of computational chemistry programs that are available to calculate molecular properties. McQuarrie has presented step-by-step SCF calculations of a helium atom in Chapter 9 and a hydrogen molecule in Chapter 10, in addition to including an entire chapter on the Hartree-Fock method and post-Hartree-Fock methods for the calculation of molecular properties. Most molecular calculations nowadays use Gaussian orbitals, and they are introduced here along with the common notation such as HF / STO-6G and HF / 6-31G** to describe the types of calculations involving Gaussian orbitals. The final sections discuss configuration interact