155932-35-7Relevant academic research and scientific papers
Synthesis and molecular structure of [2,4,6-t-Bu3C6H2]2InBr. An example of a very sterically hindered molecule
Rahbarnoohi, Hamid,Heeg, Mary Jane,Oliver, John P.
, p. 2123 - 2126 (2008/10/08)
The Grignard reagent Mes*MgBr (Mes* = 2,4,6-t-Bu3C6H2) was reacted with InCl3. The crystalline product, Mes*2InBr, was isolated in nearly quantitative yield. This compound crystallizes in the monoclinic space group P21/c with unit cell parameters a = 10.421(2) ?, b = 22.894(8) ?, c = 16.082(2) ?, β = 107.51(1)°, V = 3659(2) ?3, and Dcalcd = 1-244 g cm-3 for Z = 4. Least squares refinement based on 4280 observed reflections (I ≥ 3σ(I)) converged at R = 6.0% (Rw = 6.5%). The geometry around the indium center is trigonal bipyramidal with three short equatorial bonds and two long interactions to methyl groups on the ortho tert-butyl groups of one of the Mes* moieties. Evidence supports an interaction between the two axial methyl groups and the indium atom, but the nature of this interaction, i.e. agostic versus steric, cannot be unequivocally established by the available IR and NMR data.
