Ethers infrared absorption frequencies

The compound is soluble in H20, slightly soluble in acetone, and insoluble in ethanol or ether. The ultraviolet absorption spectrum shows a band at 38,500 cm.-1 with a molar extinction coefficient of 560. The conductivity in aqueous solution is 217 cm.2 ohm-1 mole-1. The linkage properties are determined from the infrared spectrum5 which shows a C—S stretching frequency at 825 cm.-1 for the JV-bonded isomer. 

Infrared studies have shown dependence of the carbonyl absorption value of a series of heteroannularly disubstituted ferrocene carboxylic acids and their methyl ethers on changes in the substituent in the other ring. Nes-meyariov and co-workers (31) have detected a shift to lower frequencies of yc=o values with increasing electron donation. For example, the carbonyl absorption was observed to be 1704 cm for I -sulfuralfluoroferrocene-carboxylic acid, but when the substituent was a methyl or ferf-butyl the... 

Hexaethoxycyclotriphosphazatriene is a colorless, odorless liquid for which n is 1.4522. The compound is soluble in petroleum ether, benzene, diethyl ether, carbon tetrachloride, or chloroform, but almost insoluble in water. The frequencies of the principal absorption maxima in the infrared spectrum are 3000, 1225, 1170, 1036, 972, 899, 813, 800, and 751 cm. The frequency at 1225 cm. is characteristic of a six-membered ring in this case. 

Although Wittig 170> noted that the reactivity of the ylid in ether was reduced when lithium iodide was added, Daniel and Paetsch 39> observed that the reactivity of the ylid was not reduced when lithium iodide was added to a THF solution of the ylid. In addition, they observed C—Li bond stretching vibrations in the infrared spectrum of a THF solution of the ylid 40h The absorptions at 385, 425, 475, 500 and 580 cm-1, which were attributed to the ylid, disappear on treatment with oxygen. The new band which appears at 450 cm-1 is attributable to an Li—O stretching frequency 40>. 

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