If the current density at the cathode is high enough for the formation of a thin film of hydrogen in the electrolysis of the electrolyte solutions with platinum wire electrodes, considerably intense cathode luminescence takes place; and the spectra are in most cases the same as the arc spetra (sometimes spark spectra) of the elements forming cations, and further Balmer lines of H and the molecular spectra of H2 are often observed.
Tetradecenoic acid C14H26O2 and dodecenoic acid C12H22O2 have been separated from sperm blubber oil. They are converted into dihydroxymyristic acid C14H28O4 and dihydroxylauric acid C12H24O4 respectively, and the methyl esters of these hydroxy-derivatives are subjected to the permanganate oxidation in acetone. From the results of an examination of the oxidation products, the following constitutions have been established: Tetradecenoic acid CH3·(CH2)7·CH=CH·(CH2)3·COOH, Dodecenoic acid CH3·(CH2)5·CH=CH·(CH2)3·COOH. It is thus seen that tetradecenoic acid in sperm blubber oil is identical with physeteric acid (Δ5:6-tetradecenoic acid) in sperm head oil, whilst dodecenoic acid in sperm blubber oil, to which the name denticetic acid is assigned, is Δ5:6-acid and is an isomer of linderic acid (Δ4:5-dodecenoic acid) in the seed oil of Lindera obtusiloba.
Dodecenoic acid C12H22O2 has been isolated from sperm head oil, and methyl dihydroxylaurate C13H26O4 prepared from it has been subjected to permanganate oxidation in acetone. On examining the oxidation products the constitution of dodecenoic acid has been proved to be CH3·(CH2)5·CH=CH·(CH2)3·COOH. It is thus seen that dodecenoic acid in sperm head oil is identical with denticetic acid (Δ5:6-dodecenoic acid) in sperm blubber oil described in the preceding paper.
Hexadecenol and tetradecenol have been isolated from the unsaponifiable matter of sperm head oil, and the acetates of these alcohols have been oxidised with potassium permanganate in glacial acetic acid. From the results of an examination of the oxidation products, the constitutions of these alcohols have been established as follows: Δ9:10-Hexadecenol (zoomaryl alcohol) CH3·(CH2)5CH=CH·(CH2)7·CH2OH Δ5:6-Tetradecenol (physeteryl alcohol) CH3·(CH2)7CH=CH·(CH2)3·CH2OH It is thus seen that hexadecenol and tetradecenol in sperm head oil are the mono-ethylenic alcohols corresponding to zoomaric acid (Δ9:10-hexadecenoic acid) and physeteric acid (Δ5:6-tetradecenoic acid) respectively.
Hexadecenol has been separated, in a very small yield, from the unsaponifiable matter of sperm blubber oil, and its constitution has been established as CH3·(CH2)5·CH=CH·(CH2)7·CH2OH. Hence, hexadecenol in sperm blubber oil is proved to be identical with zoomaryl alcohol (Δ9:10-hexadecenol) previously found in sperm head oil.