Synthesis and Spectroscopic and Thermal Decomposition Studies of Alkali Metal Salts of 2-Oximidopropionate

Alkali metal and tetrabutylammonium salts of 2-oximidopropionic
acid were prepared by the reaction of the free
acid with the respective hydroxides or carbonates in water at room
temperature. These compounds were
characterized by infrared and multinuclear NMR spectroscopy and thermal
gravimetric analysis. The thermal
decomposition of the salts occurs in the range 96−131 °C and
exhibit a trend toward lower temperature with
increasing size of the cation. The molecular structure of the
sodium 2-oximidopropionate hydrate was determined
by single-crystal X-ray crystallography. Crystal data: 
C3H6NO4Na, M
= 143.08, monoclinic, space group
P21/c,
a = 13.699(2) Å, b = 6.1577(7) Å,
c = 6.633(1) Å, β = 103.09(2)°,
V = 545.0(3) Å3, Z = 4,
Dcalc = 1.74 g
cm-3, R = 0.04, and
Rw = 0.05.