Tetramethylcyclobutan- l-one-3-thione

Related investigations of the reaction of diazo compounds with alkyl-substituted thioketones [R2C=S, R = Et, Pr, i-Pi, f-Bu (203) 2,2,4,4-tetramethylcyclobutan-l-one-3-thione (204), and adamantanethione (205,206)] showed that the 3,3-dialkyl-... 

Shurvell175 and collaborators have published the Raman and IR spectra of tetramethylcyclobutane-l-one-3-thione and the fully deuterated derivative. For this compound, the C=0 stretching was observed as a very strong Fermi doublet at 1811-1782 cm-1. For the deuterated species this doublet is red-shifted and was found at 1808-1775 cm-1. The C=S stretching mode was assigned to a band of medium intensity at 1303 cm-1 and 1302 cm-1 in the IR and Raman spectra, respectively, and the same for the deuterated species are found at 1306 cm-1 and 1309 cm-1, respectively. 

In a similar manner, 2,2,4,4-tetramethylcyclobutane-l-one-3-thione 5-methyUde 4 is obtained from the corresponding thiadiazoline precursor 3 at 40 °C and trapped with the dipoiarophiies a-b to give the [3-1-2] cycloadducts 5 listed in Table 5.2. ... 

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