(1) The Raman spectra of the following substances have been measured: α-furfuryl methyl ether, α-furfuryl ethyl ether, α-furfuryl-acetone, α-furyl-ethylene, α-furyl cyanide, 2,5-dimethyl-furane, 2-methyl-furyl cyanide-(5) and ethyl 2-methyl-furoate-(3). (2) The characteristic frequencies of the α-furfuryl-radical are confirmed. The difference of the Raman spectra of the mono-and di-derivatives of furane is established. (3) The constitutive influences exerted on the Raman frequencies in the region between Δν 1400 and 1600 cm.−1 are observed. (4) The Raman lines at 1642 and 1292 cm.−1 in α-furyl-ethylene are associated with the structure of R–CH:CH2, and those at 183, 570, and 2233 cm.−1 in α-furyl cyanide with the structure of R–C≡N, when R is taken as furyl radical.
(1) A new complex compound [Co(NH3)4Cl H2O(6)(1)]Cl2 was found by the spectrographic analysis. (2) Trans-dichloro-tetrammine cobaltic chloride in aqueous solutions changes in the following scheme: (Remark: Graphics omitted.) (3) The velocity constants of the first two reactions were found to be 1.39×10−3 and 9.05×10−4 respectively. (4) The absorption curves were found for the unstable complex salts [Co(NH3)4Cl2(6)(1)]Cl and [Co(NH3)4Cl H2O(6)(1)]C12, both of which can never exist in acqueous solutions without contamination of related compounds. (5) The praseo-salt shows a third absorption band of the same type as that of [Co(NH3)4(NO2)2(6)(1)]Cl. (6) The third absorption band is supposed to be one of the general characteristics of those complex salt which have in the co-ordination at least one pair of ions in trans-positions to each other. (7) Substitution of Cl in [Co(NH3)4Cl2(6)(1)]Cl or [Co(NH3)4Cl H2O(2)(1)]C12 by H2O, has hypsoehromic effect.
After having found in a previous study that sardine oil contains an octadecatrienoic acid as a minor constituent of highly unsaturated C18-acids, we have attempted in the present experiment to separate the octadecatrienoic acid starting with a large amount of sardine oil. The results of the present experiment seem to indicate that the octadecatrienoic acid giving an etherinsoluble bromide is contained only in far lesser proportion than presumed before.
Methyl clupanodonate has been oxidised with potassium permanganate in acetone solution. Among the oxidation products propionic acid, acetic acid, succinic acid and methyl hydrogen succinate have been identified. Of these compounds acetic acid is believed to be formed by the secondary decomposition of malonic acid. Accordingly the presence of above-mentioned oxidation products gives an indication of the presence of the following groups in clupa-nodonic acid jointed by ethylenic linkings thus: CH3·CH2·CH=, =CH·CH2CH=, three of =CH·(CH2)2·CH=, and =CH·(CH2)2·COOH. These results agree fully with those obtained in a previous experiment of the ozonolysis of amyl clupanodonate.
Potassium clupanodonate has been oxidised with potassium permanganate in alkaline solution under cooling. Among the oxidation products, propionic, acetic and succinic acids have been separated. Also the presence of malonic acid is indicated. Of these compounds acetic acid is believed to be formed by a further degradation of malonic acid, and consequently the above results show that the respective groups jointed by the ethylenic linkings in clupano-donic acid are CH3·CH2·CH=, =CH·CH2·CH=, three of =CH·(CH2)2·CH=, and =CH·(CH2)2·COOH, provided the terminal group containing the carboxyl group is assumed to be =CH·(CH2)2·COOH. The results of the present experiment agree fully with those obtained in tile previous experiments of the ozonolysis of amyl clupanodonate and the permanganate oxidation of methyl clupanodonate in acetone solution.