Seventeen-Coordinate Actinide Helium Complexes

Rare Earth and Actinide Complexes

Stephen M. Mansell 1,* and Stephen T. Liddle 2,* 1 Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK 2 School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK * Correspondences: [email protected] (S.M.M.); [email protected] (S.T.L.); Tel.: +44-131-451-4299 (S.M.M.); +44-161-27...

Alkali-helium snowball complexes formed on helium nanodroplets.

We systematically investigate the formation and stability of snowballs formed by femtosecond photoionization of small alkali clusters bound to helium nanodroplets. For all studied alkali species Ak = (Na,K,Rb,Cs) we observe the formation of snowballs Ak(+)He(N) when multiply doping the droplets. Fragmentation of clusters Ak(N) upon ionization appears to enhance snowball formation. In the case o...

Bonding in Low-Coordinate Complexes

Structure and Thermodynamics of Lanthanide and Actinide Complexes in Solution

Several questions of importance in the study of lanthanide and actinide coordination compounds are reviewed. There is considerable evidence that in aqueous solution the primary coordination number is nine for the ions La(ni) through Nd(m) and eight for the ions heavier than Gd(m). While it seems that some degree of covalency exists in the metal—ligand bonding a model of electrostatic bonding se...

Cationic Complexes of Hydrogen with Helium

High-resolution mass spectra of helium nanodroplets doped with hydrogen or deuterium reveal that copious amounts of helium can be bound to H(+), H(2)(+), H(3)(+), and larger hydrogen-cluster ions. All conceivable He(n)H(x)(+) stoichiometries are identified if their mass is below the limit of ≈120 u set by the resolution of the spectrometer. Anomalies in the ion yields of He(n)H(x)(+) for x=1, 2...