A neutron diffraction study of ytterbium(II) cyclic organohydroborates

Abstract

The complete structure of {K(MeTHF) 3} 2{Yb{(μ-H) 2BC 8H 14} 4} including the positions of the H atoms has been determined by single-crystal neutron diffraction on the quasi-Laue diffractometer VIVALDI at the Institut Laue-Langevin in Grenoble, France. Each [(μ-H) 2BC 8H 14] − ligand is coordinated to the Yb atom via two Yb–H–B bridges, and two out of the four [(μ-H) 2BC 8H 14] − units exhibit C–H···Yb agostic interactions. Crystallographic details: space group C2/ c (Monoclinic); a = 17.62 (4), b = 19.92(4), c = 21.05 (4) Å; β = 95.62(9) Å; Z = 4. Final agreement factor: R(F) = 13.5% for 1668 unique reflections with I > 2 σ( I).