Peculiar metal complex conformations - are the hydrogens really so close?
It has been observed that in some crystal structures the distance between hydrogen atoms can be shorter than the sum of their van der Waals radii. This is particularly frequent in metal complexes of 2,2'- and 4,4'-bipyridine in which the ligand is forced in a flat conformation. By collecting accurate neutron diffraction data for archetypes of these spices the project herein presented aims to understand if this is really the case and how it is possible. The results will help redetermining precise value of the hydrogen radii. Benefits are foreseen for the design of this class of chemicals, which are of particular interest as pharmaceuticals as well as in material science.
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LUSI Matteo; BOSCAINO Annalisa and CAPELLI Silvia. (2013). Peculiar metal complex conformations - are the hydrogens really so close?. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-12-303