Analysis of Hydrogen Bonds in Crystals

<p>Crystal structures are a source of information on geometries of species<br />that form networks in solids in addition to providing information on the<br />nature of interactions that occur between them. Hydrogen bonding is one<br />of the most important interactions responsible for the arrangements of<br />molecules and ions in crystals. For this reason this special issue collects<br />new interesting and important findings and ideas on the role of the<br />hydrogen bond in crystals.<br />The contributions of this issue may be classified into three groups: the<br />first concerns new crystal structures where interesting arrangements of<br />species are described; the second group considers crystal structures and<br />their observed phenomena; and the last group is strongly related to a<br />discussion on theoretical results where often hydrogen bond interactions<br />are compared with other interactions (halogen bond pnicogen bond<br />carbon bond etc.).<br />Despite the fact that the last group of articles concerns the results of<br />calculations it is strongly associated with experiment since the results are<br />compared with experimental observations. Besides other interesting<br />phenomena the hydrogen bond interactions are well described in the<br />theoretical work.</p>