Table of Contents

Preface.Jan Linderberg, Scientist, Teacher, Friend. Poul Jørgensen and his science. Multi-photon absorption of molecules.Two-bond spin-spin coupling constants (^2hJX-Y) across X-H-Y hydrogen bonds: Some fundamental. Structure optimizations for excited states with correlated second-order methods: CC2 and ADC(2).Angular symmetry and Hylleraas coordinates in four-body problems. The rotational g tensor as a benchmark for ab initio molecular property calculations.Linear response properties required to simulate vibrational spectra of biomolecules in various media: (R)-Phenyloxirane (A comparative theoretical and spectroscopic vibrational study).A theoretical model to calculate fundamental physical parameters for molecule-particle interactions. Birefringences: A challenge for both theory and experiment. The ab initio calculation of optical rotation and electronic circular dichroism. Response of a molecule to adding or removing an electron.A non-iterative numerical solver of Poisson and Helmholtz equations using high-order finite-element functions.Some trends in relativistic and electron correlation effects in electric properties of small molecules.Restricted density functional response theory for open-shell systems.The multiconfigurational spin-tensor electron propagator method (MCSTEP).