B. Y. Kimura, T. L. Brown
1971
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0
Influential Citations
39
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract Concentration and temperature dependent 1H and 7Li NMR spectra have been evaluated for lithium bis(trimethylsilyl)amide, LiN[Si(CH3)]32, in ethers and hydrocarbon solvents. The results are interpreted in terms of a monomer-dimer equilibrium in THF and a dimer-tetramer equilibrium in hydrocarbon solvents. Thermodynamic parameters, ΔH0 = −4.0 kcal/mole, ΔS0 = −17 cal · deg−1 · mole−1, obtained for the equilibrium, dimer ⇄ 2 monomer, in THF solutions indicate that the monomer is preferentially solvated in solution. These conclusions are substantiated by isopiestic molecular weight determinations.