The speed of sound of binary mixtures of 2-methoxyethanol with diethylamine, triethylamine, propylamine, dipropylamine, sec-butylamine and tert-butylamine has been measured as a function of composition at 298.15 K. From the experimental data, values of deviations in the speed of sound (Áu) and isentropic (Á) compressibility from ideality have been calculated. The results for Áu and Á are discussed on the basis of intermolecular interactions between the components of the analysed mixtures.

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Different tributyltin phenoxides react at room temperature with ethyl propiolate in benzene, in the presence of tin(IV) chloride, triethylamine and their mixture to give the derivatives of 3-phenoxyacrylic acid ethyl ester. Exceptionally, 3-(2-hydroxyphenyl)acrylic acid ethyl ester and 3-(2-hydroxy-5-methylphenyl)acrylic acid ethyl ester have been obtained from the reaction of tributylphenoxytin and tributyl(p-tolyloxy)tin, respectively catalysed by SnCl 4 , and they have been easily hydrolysed to coumarin and 6-methylcoumarin.

Thioxanthene (l"), 2-chlorothioxanthene (2*) and l-chloro-4-methylthioxanthene (3*) were obtained as products of reduction of thioxanthen-9-one (1), 2-chlorothioxanthen-9-one (2) and l-chlorothioxanthen-9-one (3) using dibutyltin chlorohydride. The mechanism of this reaction, involving formation of thioxanthyl cations, has been suggested by comparing it with the course of hydrostannation of cyclopropyl-4-methoxyphenylmenthon.

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