The properties of the simplest sodide, LiNa(CH3NH2) n , are reported as a function of n. The phase diagram, established by using differential thermal analysis, shows the presence of a compound with n ≈ 6, which melts congruently at 168.5 ± 0.5 K. Two eutectics are present with n = 7.3 ± 0.3, T 1 = 166 ± 1 K and n = 3.0 ± 0.2, T 2 = 151 ± 1 K. The phase diagram was extended to metal concentrations that correspond to n = 1.45 and indicated the presence of a second compound with 2 ≤ n ≤ 3. The properties of these systems were investigated by EPR and alkali metal NMR spectroscopies and static magnetic susceptibilities. The 23Na NMR results clearly show that sodium is present as Na- for n ≥ 8. At higher metal concentrations the resonance line shifts smoothly toward more paramagnetic values (positive), with larger shifts at higher temperatures. EPR spectroscopy shows a transition from a single nearly symmetric line at large values of n to a strongly asymmetric signal characteristic of conduction electron spin resonance (CESR) when n ≤ 5. The line shapes were fit by theoretical expressions and showed that liquid LiNa(CH3NH2)4 has a conductivity comparable to that of liquid Li(CH3NH2)4, a near metal.

from 95% ethanol it melted at 120-122 °C [lit.1 2* mp [121][122] °C (for enantiomer14)].

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