793635-58-2Relevant academic research and scientific papers
Bonding in Barium Boryloxides, Siloxides, Phenoxides and Silazides: A Comparison with the Lighter Alkaline Earths
Carpentier, Jean-Fran?ois,Cordier, Marie,Dorcet, Vincent,Hammoud, Joanna,Kahlal, Samia,Le Coz, Erwann,Roisnel, Thierry,Saillard, Jean-Yves,Sarazin, Yann
, p. 11966 - 11982 (2021)
Barium complexes ligated by bulky boryloxides [OBR2]? (where R=CH(SiMe3)2, 2,4,6-iPr3-C6H2 or 2,4,6-(CF3)3-C6H2), siloxide
Synthesis of the monomeric HBTrip2 (trip = 2,4,6-i-Pr3C6H2) and the X-ray crystal structures of [HBMes2]2 (Mes = 2,4,6-Me3C6H2) and HBTrip2
Bartlett, Ruth A.,Dias, H. V. Rasika,Olmstead, Marilyn M.,Power, Philip P.,Weese, Kenneth J.
, p. 146 - 150 (2008/10/08)
The synthesis and spectroscopic properties of HBTrip2 (1) and the X-ray crystal structures of 1 and the dimeric species [HBMes2]2 (2) are described. The synthesis of 1 was carried out by treatment of Me2S·BHCl2 with 2 equiv of TripMgBr in THF solution. Standard workup gave 1 as a colorless crystalline material that exhibited a broad singlet at 73.5 ppm downfield in the 11B NMR spectrum. X-ray data confirmed a monomeric structure with a planar boron center and a wide CBC angle of 128.0 (4)°. The less sterically encumbered 2 was prepared according to a literature procedure. The X-ray crystal structure reveals a dimeric structure with the expected bridging hydrogens. The compounds of 1 and 2 are the first diorganoboranes to be structurally characterized by X-ray crystallography. In addition, the structure of 1 represents the first structural characterization of a monomeric diorganoborane. Crystal data at 225 K for 1 or 140 K for 2, with Mo Kα (λ = 0.71069 A?) radiation: 1, monoclinic, a = 11.116 (4) A?, b = 14.869 (5) A?, c = 17.321 (6) A?, β = 100.19 (3)°, Z = 4, space group P21/c, R = 0.093; 2, monoclinic, a = 12.254 (6) A?, b = 7.768 (2) A?, c = 16.785 (6) A?, β = 109.43 (3)°, Z = 2, space group P2/n, R = 0.047.
