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Absorption Spectra of «.^-Unsaturated Cyclic Ketones 1230 trated sulfuric acid and fractionally distilled from metallic sodium.Cyclopentanols.-1-Propylcyclopentanol, m. p. -17.0°, b. p. 72°at 12 mm., d2\ 0.9046, »íod 1.4538, and 1-isopropylcyclopentanol, m. p. 21-22°, b. p. 70°at 15 mm., d"< 0.9135, w"d 1.4560, were prepared, dehydrated over iodine and hydrogenated by standard procedures.A solution of 63 g. of 1-propylcyclopentanol in 70 g. of absolute ethanol was hydrogenated directly to propylcyclopentane over nickel catalyst at 250°under 250 atm. of hydrogen, yielding a two-phase mixture of water, alcohol and propylcycldpentane.1-Allylcyclopentanol was prepared by adding 536 g.(7 moles) of allyl chloride and 504 g. (6 moles) of cyclopentanone in 3000 ml. of dry ether to 146 g. (6 atoms) of magnesium turnings and 1500 ml. of dry ether in a copper

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