A neutron diffraction study of ytterbium(II) cyclic organohydroborates

The complete structure of {K(MeTHF)3}2{Yb{(μ-H)2BC8H14}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)2BC8H14]− ligand is coordinated to the Yb atom via two Yb-H-B bridges, and two out of the four [(μ-H)2BC8H14]− 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 > 2σ(I).