Detail of "30389-18-5"

Reference

Inhibition of nitrification in soil by acetylenic compounds

Inhibition of nitrification in soil by acetylenic compounds. McCarty, G. W.; Bremner, J. M. (Dep. Agron., Iowa State Univ., Ames, IA 50011, USA). Soil Sci. Soc. Am. J., 50(5), 1198-201 (English) 1986. CODEN: SSSJD4. ISSN: 0361-5995. DOCUMENT TYPE: Journal CA Section: 19 (Fertilizers, Soils, and Plant Nutrition) Section cross-reference(s): 5 Recent work has shown that acetylene [74-86-2] is a potent inhibitor of nitrification in soil. To discover if substituted acetylenes inhibit nitrification in soil, the effects of 17 monosubstituted (HC Y CR) acetylenes (propyne [74-99-7], 1-butyne [107-00-6], 2-ethynylpyridine [1945-84-2], phenylacetylene [536-74-3], 3-butyn-2-one [1423-60-5], 1-phenyl-2-propyn-1-ol [4187-87-5], pentyne [26856-36-0], 4-phenyl-1-butyne [16520-62-0], 5-phenyl-1-pentyne [1823-14-9], 1-ethynylcyclohexylamine [30389-18-5], 2-propyn-1-ol [107-19-7], 2-propyn-1-amine [2450-71-7], 1-hexyne [693-02-7], 3-butyn-1-ol [927-74-2], 1-heptyne [628-71-7], 1-octyne [629-05-0], acetylene monocarboxylic acid [471-25-0]) and of 7 disubstituted (RC Y CR1) acetylenes (2-butyne [503-17-3], 3-phenyl-2-propyn-1-ol [1504-58-1], diphenylacetylene [501-65-5], 2-butyn-1-ol [764-01-2], 2-butyn-1,4-diol [110-65-6], acetylene dicarboxylic acid [142-45-0], 2-butynoic acid [590-93-2]) were studied on prodn. of (NO3- + NO2-)-N in soils treated with (NH4)2SO4. Most of the substituted acetylenes tested inhibited nitrification in soil, and some were potent inhibitors of nitrification. The results with the 4 gaseous compds. tested showed that acetylene, propyne, and 1-butyne inhibited nitrification in soils at partial pressures as low as 0.1 or 1.0 Pa, whereas 2-butyne had little or no effect on nitrification at partial pressures as high as 10 Pa. The data obtained with the 21 nongaseous compds. tested showed that 2-ethynylpyridine, phenylacetylene, and 3-butyn-2-one had the greatest inhibitory effect on nitrification and that acetylene monocarboxylic acid, acetylene dicarboxylic acid, and 2-butynoic acid had the least effect. Studies to measure prodn. of C2H2 in soils treated with the nongaseous compds. showed that the inhibition of nitrification obsd. with these compds. was not due to C2H2 formed by their decompn. in soil. Expts. reported indicate that 2-ethynylpyridine and phenylacetylene compare favorably with nitrapyrin (N-Serve) and etridiazole (Dwell) as soil nitrification inhibitors and have potential practical value for retarding nitrification of fertilizer N in soil.

Primary amines: a low-temperature dielectric relaxation study

Primary amines: a low-temperature dielectric relaxation study. Gilchrist, John (Cent. Rech. Tres Basses Temp., CNRS, Grenoble 38042, Fr.). Chem. Phys., 80(1-2), 63-72 (English) 1983.Several reagents with their cas registry numbers 30389-18-5 and 88418-41-1 are used here. CODEN: CMPHC2. ISSN: 0301-0104. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) The 4.2 K dielec. absorption spectrum of a polyethylene film contg. 1-aminoadamantane is reported. At very low frequencies the absorption varied as the square of frequency, and the Cole-Cole plot approached the real axis at 45°. This exemplifies a characteristic behavior of primary amines and is to be expected only if the amino proton spin symmetry species are relatively long lived. Tunnel splittings of the normal and deuterated species are evaluated. Eighteen other amine species were studied, including aminocycloalkanes, alkylhydrazines, and dialkylhydrazines. Aminocyclobutane relaxed faster than most (low inversion barrier) and methylhydrazine relaxed slowly in accordance with expectations based on its microwave spectrum. .