199169-92-1Relevant academic research and scientific papers
The synthesis and structure of sterically encumbered terphenyl tin(II) halide derivatives: Simultaneous existence of monomers and dimers in the crystalline phase
Eichler, Barrett E.,Pu, Lihung,Stender, Matthias,Power, Philip P.
, p. 551 - 556 (2001)
The reaction of Et2O·LiC6H3-2,6-Trip2 (Trip = C6H2-2,4,6-i-Pr3) with SnCl2 afforded the two coordinate monomer Sn(Cl)C6H3-2,6-Trip2 (1), and its dimer {Sn(μ-Cl)C6H3-2,6-Trip2}2 (2), as orange and yellow crystals, respectively. Solution 119Sn NMR spectroscopy of 2 in C6D6 solution showed that it dissociated readily to give 1. The addition of pyridine (py) to a solution of 1 yielded the adduct py·Sn(Cl)C6H3-2,6-Trip2 (3) which featured tin in a three coordinate pyramidal environment. The reaction of the closely related bulky terphenyl lithium reagent LiC6H3-2,6-Dipp2 (Dipp = C6H3-2,6-i-Pr2 with SnCl2 afforded the mixed halide species {Sn(μ-Cl)0.35(μ-I)0.65C6H3 -2,6-Dipp2}2 (4). This arose from the preparation of the lithium aryl precursor in situ from IC6H3-2,6-Dipp2 and n-BuLi. The monomeric nature of 1, and the weak association of 2 and 4, were attributed to the large size of the terphenyl ligands. All compounds were characterized by X-ray crystallography, 1H, 13C and 119Sn NMR spectroscopy, and IR and UV-Vis spectroscopy.
