7Li PGSE diffusion measurements on LiPPh2: a solvent dependence of the structure.
The first application of 7Li pulsed-gradient spin-echo (PGSE) diffusion methods to structural lithium chemistry is reported. The data, which provide quantitative diffusion constants at 155 K, lead to a new method of estimating solvent viscosity at this temperature and clearly show a solvent dependence for the structure of LiPPh2. In THF, LiPPh2 exists as a mononuclear solvated species, whereas in Et2O, a dinuclear structure is found. D values for the model compound PHPh2 in THF have been measured.
Fernández
Ignacio
I
Laboratory of Inorganic Chemistry, ETHZ HCI Hönggerberg, CH-8093 Zürich, Switzerland.
Martínez-Viviente
Eloísa
E
Pregosin
Paul S
PS