Über die Ester der schwefligen Säure. I

Effect of Inorganic Salts upon the Swelling and the Shrinking of Wood2

“…Shrinkage measurements were at first made on salt-treated sections that were dried in the oven at (8) In connection with some earlier electrical conductivity measurements by the author {./. Phys.…”

pH Independent equilibrium constants and rate constants for formation of the bisulfite addition compound of isobutyraldehyde in water

“…sulfite addition compounds, the sulfur is tetravalent. In view of the oxidizability of many tetravalent sulfur compounds, the ease of hydrolysis of sulfite esters, 16 and the fact that alkyl hydrogen sulfites (like sulfurous acid) are unknown, 1 would be expected to yield free sulfite or to behave like free sulfite when our equilibration solutions were quenched with acid before iodometric titration. Hence, when isobutyraldehyde is present in greater and greater excess over sulfite, the fraction of sulfite that is titratable should approach [!]/([!]…”

Organic Sulfites.

“…The reaction mixture is usually cooled and stirred (139,217,230). This may also be effected by the passage of an inert gas such as carbon dioxide (234,236), which carries away the generated hydrogen chloride. After completion of the addition of thionyl chloride the mixture is often refluxed for some time or heated on a water bath until hydrogen chloride is no longer evolved.…”

“…Another procedure, applied only for diphenyl sulfite, consists in reacting thionyl chloride with a suspension of sodium phenolate in toluene or ether (13,236). But the yields were definitely lower than with the refluxing solvent technique, which gives 85% within 2 hr.…”