Chemistry, Volume 2, Issue 4 (December 2020) – 10 articles
Cover Story (view full-size image): X-ray crystallographic and spectroscopic studies on bis(diphenylphosphino)methane dioxide (dpmo2) coordination toward the lanthanide trichlorides reveal clear trends across the series with eight-coordinate (square antiprismatic) cations [M(dppmO2)4]3+ (M = La, Ce, Pr, Nd, Sm, Eu, Gd), whereas seven-coordinate (distorted pentagonal bipyramidal) [M(dppmO2)3Cl]2+ occur for M = Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, while LuCl3, alone, forms the six-coordinate (distorted octahedral) species [Lu(dppmO2)2Cl2]+. The decreasing coordination numbers and geometry along the series is driven by a combination of the reduction in the radii of the lanthanide cations, leading to an increase in the charge/radius ratio, as well as the competition caused by the presence of the chloride ions. View this paper.
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