Synthesis and structural study of new metallasilsesquioxanes of potassium and uranium.
The first metallasilsesquioxanes comprising potassium and uranium have been synthesized and structurally characterized by single-crystal X-ray diffraction. (Cy7Si7O12)2K6(DME)4(2; Cy = cyclohexyl) is a centrosymmetric dimer, in which the two silsesquioxide ligands are interconnected by μ3- and μ4-bridging siloxide moieties. (Cy7Si7O12)2UVI(3) represents the first metallasilsesquioxane complex of an actinide element, featuring a U atom that is coordinated by two tridentate silsesquioxide ligands in a distorted octahedral fashion. The different structural effects of the large metal atomic radii are discussed.
Chemisches Institut der Otto-von-Guericke-Universität, 39106 Magdeburg, Germany. frank.edelmann@ovgu.de.
Stephan
S
Gießmann
Chemisches Institut der Otto-von-Guericke-Universität, 39106 Magdeburg, Germany. frank.edelmann@ovgu.de.
Volker
V
Lorenz
Chemisches Institut der Otto-von-Guericke-Universität, 39106 Magdeburg, Germany. frank.edelmann@ovgu.de.
Phil
P
Liebing
Chemisches Institut der Otto-von-Guericke-Universität, 39106 Magdeburg, Germany. frank.edelmann@ovgu.de.
Liane
L
Hilfert
Chemisches Institut der Otto-von-Guericke-Universität, 39106 Magdeburg, Germany. frank.edelmann@ovgu.de.
Axel
A
Fischer
Chemisches Institut der Otto-von-Guericke-Universität, 39106 Magdeburg, Germany. frank.edelmann@ovgu.de.
Frank T
http://orcid.org/0000-0001-5209-0018
FT
Edelmann