Add time:07/26/2019         Source:sciencedirect.com

Publisher SummaryThis chapter presents the nomenclature, physical properties, synthesis, and methods of analysis of sodium valproate and valproic acid. Sodium valproate is sodium 2-propylpentanoate. It is also known as sodium dipropylacetic acid, sodium 2-propylvalerate, sodium dipropylacetate, sodium di-n-propylacetate, and by many slight variations of the particular nomenclature. Sodium valproate is a white crystalline powder with a very slight characteristic odor of valproic acid. Valproic acid is 2-propylpentanoic acid. It is also known as n-dipropylacetic acid, 2-propylvaleric acid, DPA, and by many slight variations of the particular nomenclature. Valproic acid is a colorless slightly viscous liquid, and has a characteristic odor of valproic acid. The infrared spectrum of sodium valproate is presented in the chapter. The spectrum has been measured in the solid state as a potassium bromide dispersion. The nuclear magnetic resonance spectrum of sodium valproate, shown in the chapter, has been obtained on a Varian Associates T-60 NMR Spectrometer in deuterium oxide containing tetramethylsilane as the internal standard. Sodium valproate is not sufficiently volatile for mass spectral analysis. The mass spectrum of valproic acid has been obtained using an Associated Electrical Industries Model MS-902 Mass Spectrometer with the ionization electron beam energy at 70 eV. High-resolution data have been compiled and tabulated with the aid of an on-line PDP-11 Computer.

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