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Halogen bonding is very similar to hydrogen bonding. Being rare it is sometimes called as “the lost brother of hydrogen bonding”.

Thesis reports new halogen(I) complexes formed from mono- and multivalent ligands in solution, in gas phase and in the solid state. The progression of halogen bonding and complex formation was monitored by using NMR spectroscopy in solution and the resulting structures were studied using single crystal X-ray crystallography in the solid state.

Detailed information about the effects affecting the formation of a halogen bond were discovered. New iodine(I) structures, and their analogous silver(I) structures were obtained from positively charged silver(I) [N···Ag···N]+ complexes which reacted with elemental iodine resulting in the desired iodine(I) [N···I···N]+ complexes. The known “linear” nature of iodine(I) mediated halogen bonds makes them predictable and thus can be employed in the design and construction of larger supramolecular entities.

The thesis results provide useful information on halogen bonding which is relatively new field of supramolecular chemistry and helps to demonstrate the usefulness of the iodine(I) as elemental part of a halogen bond, which can be use in the design of new halogen bond based materials.

The opponent is docent Anssi Peuronen (Turun yliopisto) and custos is professor Kari Rissanen. The language of the dissertation is English. The thesis is