Detail of "4187-87-5"

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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.

Polypyrrole-supported graphite felt for acetylene coupling reaction in solid phase

Polypyrrole-supported graphite felt for acetylene coupling reaction in solid phase. Kashiwagi, Yoshitomo; Chiba, Shinya; Ikezoe, Hiroshi; Anzai, Jun-ichi ( Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan). Synlett, (14), 2513-2516 (English) 2004 Georg Thieme Verlag. CODEN: SYNLES. ISSN: 0936-5214. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Substrate immobilization on graphite felt for solid-phase acetylene coupling reaction was achieved by electrochem. polymn. of the substrate precursor contg. a pyrrole side chain, where the amt. of substrate on the electrode surface was easily controlled by the no. of repeated cyclic voltammetric scannings.In this experiment, several chemicals are used like 4187-87-5 and 830329-25-4 Couplings between terminal acetylenes and the iodobenzene-modified graphite felt electrode or arom. iodides and the terminal acetylene-modified graphite felt electrode in the presence of palladium catalyst proceeded smoothly in satisfactory yields. .