Abstract
Mixtures of squalene and cobalt naphthenate and/or sulfur were heated in the atmosphere or nitrogen gas. The products were separated by column chromatography and analyzed by infrared and NMR spectroscopy. The appearance of a definite small peak at 1.35ppm of vulcanized squalene may be due to the chemical shift of-CH=CH-by addition of sulfur. Squalene did not react with cobalt naphthenate at 150°C in nitrogen gas. In the atmosphere, the oxidation of squalene was accelerated by cobalt naphthenate which decomposed in to naphthenate and cobalt. The NMR spectrum of the product obtained from the mixture of squalene, cobalt naphthenate and sulfur showed a strong resonance at 1.25ppm which represented -C-CH2- group. A similar NMR spectrum was observed from the product of the mixture of squalene, cobalt stearate and sulfur. The finding suggests that the addition reaction occurred between squalene and some cobalt salts in the presence of sulfur. When a zinc plate was heated in the mix solution of squalene, cobalt naphthenate and sulfur, it is found by XMA that large amounts of cobalt and sulfur transferred to the surface of the zinc plate.
