Pentylamine Research Articles

A Spectroscopic Study of the Hemiammine Dicobalt (II) Species

AbstractInfrared spectrum of amyl amine forming cobalt complex in benzene solution is described. The D, value and transitions between d orbitals are identified. Since few transition metal salts are soluble in inert solvent, this paper introduces a special method of making cobalt‐2‐ethyl‐hexanoate which is soluble in benzene.

Pulse radiolysis of ethyl, n-propyl, n-butyl and n-amyl amine in aqueous solutions

Pulse radiolysis of protonated and unprotonated ethyl (EA), n-propyl ( n-PA), n-butyl ( n-BA) and n-amyl amines ( n-AA) has been carried out. For all unprotonated amines k( e aq -+RNH 2) = (1·0 ± 0·1) × 10 6 dm 3 mol −1 s −1 was found, whereas the corresponding k-values for the protonated amines were higher by a factor of 2·5 to 3. With increasing chain length of the amine molecule the k(OH+RNH 3 +) values rise from 0·12 × 10 9 dm 3 mol −1s −1 (for EA) to 6·2 × 10 9 dm 3 mol −1s −1 (for n-AA). However, they are lower than the corresponding k(OH + RNH 2) values (6·2 × 10 9 dm 3 mol −1 s −1 for EA and 9 × 10 9 dm 3 mol −1 s −1 for n-AA). A chain length dependance was also observed for k(O aq − + RNH 2), starting with 8·65 x 10 9 dm 3 mol −1s −1 (EA) and reaching 15·2 x 10 9 dm 3 mol −1s −1 ( n-AA). The absorption spectra of the transients produced by reaction of OH radicals with the two forms of the amines show significant differences. The short-lived protonated species give absorption maxima between 212·5 and 215 nm ( ϵ max = 96−108 m 2 mol −1), while the corresponding data for the unprotonated transients are 222·5−225 nm ( ϵ max = 145−173 m 2 mol −1). The rate constants for the second-order disappearance of the protonated species decrease gradually with an increase of the molecule chain length (2 k = 1·2 × 10 9 dm 3 mol −1 for EA to 0·4 × 10 9 dm 3 mol −1 s −1 for n-AA) and are lower than the values for the unprotonated transients (2 k = 1·7 × 10 9 dm 3 mol −1 s −1 for EA to 0·7 × 10 9 dm 3 mol −1 s −1 for n- AA). In accordance with previous observations it can be stated that OH radicals attack protonated amines mainly on the C-atoms farthest from the —NH 3 + group, while in the case of unprotonated amines the H abstraction occurs preferentially on N-atom and α-C positions. The results are of particular interest for radiation biology.

Ion Etching of TMV

Carbon films can be made hydrophilic, and therefore more suitable for supporting preparations of proteins or nucleic acids, if they are first subjected to an AC glow discharge in vapors of amyl amine (E. Kellenberger, personal communication). In our laboratory, we have observed that grids lose their carbon film if they are placed close to the cathode in a DC glow discharge apparatus. Further investigation of this phenomenon has shown that positive ions will affect the surface in the same way as a milling machine. Fig. 1 is a schematic of the ion gun built and used in our studies. Shown are the relative positions of the fixed cathode, movable anode and rotatable target which supports the grids. The extent of etching of the biological material being investigated can be varied, and is a function of the time, voltage, and angle which the specimen presents to the ion beam.

The chemical composition of scent of fresh water fish with special reference to amines and amino acids

1. Chemical analyses of the scent of brook trout (Salvelinus fontinalis fontinalis) and of brown trout (Salmo fario trutta) were made in connection with a study of the mechanisms by which Petromyzon marinus localizes its prey. 2. The amino nitrogen in the scent of brook trout varies between 63 and 87% of the total nitrogen present with an average of 77%; for the brown trout this value is 63%. The ratio between amino nitrogen and total nitrogen was relatively constant in all the tests. 3. Of the total amino nitrogen 98% was ammonia. 4. The amount of amino nitrogen released by the fish per time unit was independent of the duration of the experiment and the rate of which the water was removed for sampling. 5. Per fish/hour the amino nitrogen varied between 0.220 and 0.485 mg. with an average of 0.3513 and a standard deviation of 0.0618 for brook trout. 6. For brown trout the amino nitrogen per fish/hour was 0.134 to 0.185 mg. 7. Two per cent of the total amino nitrogen consisted of amines. 8. Ten amines were isolated, their Rf-values and reaction with iodine vapour determined. Elementary analysis could be carried out on three amines. 9. Analytical tests indicate that the following groups of amines are present: histamine, methylamine, ethylamine, di-methylamine and secondary butylamine. In addition, two amines belong to either or both of the propyl and amyl amine groups. 10. The following amino acids were present in the scent: Glycine, alanine, leucine, iso-leucine, serine, arginine, histidine, aspartic acid, glutamic acid.

On the Electrical Conductivity of Solutions in Amyl Amine

On the Electrical Conductivity of Solutions in Amyl Amine