Reference

Phosphonosuccinic acid and its salts as herbicides

Phosphonosuccinic acid and its salts as herbicides. Takahashi, Hiroki; Kuwabara, Masao; Mutsukado, Motoo; Oya, Tsunehiko; Arimitsu, Takeshi (Nissan Chemical Industries, Ltd., Japan). Japan. Kokai JP 51088636 3 Aug 1976 Showa, 4 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: A01N009-26. APPLICATION: JP 75-12800 30 Jan 1975. DOCUMENT TYPE: Patent CA Section: 5 (Agrochemicals) Phosphonosuccinic acid (I) [5768-48-9] and its alkali, ammonium, or amine salts are herbicides or plant growth inhibitors. The effect was not exhibited by soil treatment, but by spraying to leaves.In this article, certain chemicals are used. Some of their cas registry numbers are 61258-29-5 and 762-04-9 Thus, heating (EtO)2PH:O [762-04-9] with 1 mole di-Et fumarate [623-91-6] and 0.5 mole Et3N at 80-5.degree. for 8 hr gave 75.8% I tetra-Et ester [7071-15-0], which (15.5 g) was hydrolyzed in 35% HCl at 100.degree. for 23 hr and evapd. to give 10.1 g I. I was stirred with 3 moles C5H5N in MeOH and evapd. to give 1:1 I-C5H5N salt [61258-31-9], which had nonselective herbicidal effect by spraying to leaves at 40 kg/ha level. Also effective were I, its mono-K [61258-32-0], monoammonium [61258-33-1], and mono- to tetra-Na salts. .

Reactivity of vinylferrocene and vinylcymantrene in radical initiated solution copolymerizations

Reactivity of vinylferrocene and vinylcymantrene in radical initiated solution copolymerizations. Pittman, Charles U., Jr.; Rounsefell, Thane D. (Dep. Chem.Chemicals with cas numbers 96-33-3 and 2039-80-7 also play role., Univ. Alabama, University, Ala., USA). Macromolecules, 9(6), 936-8 (English) 1976. CODEN: MAMOBX. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) Vinylferrocene (I) [1271-51-8] was classified within the Q-e scheme as an exceptionally electron rich vinyl monomer from studies of radical copolymn. with 12 vinyl org. monomers. In copolymn. with vinylcymantrene (II) [12116-27-7], N-vinylcarbazole [1484-13-5], p-N,N-dimethylaminostyrene [2039-80-7], 1,3-butadiene [106-99-0], N-vinyl-2-pyrrolidone [88-12-0], and styrene [100-42-5], the value of e for I was in the range -2.0 to -2.6 and the Q-e scheme was applicable. The Q-e scheme failed when electron deficient comonomers such as Me methacrylate [80-62-6], Me acrylate [96-33-3], acrylonitrile [107-13-1], diethyl fumarate [623-91-6], fumaronitrile [764-42-1], and maleic anhydride [108-05-4] were used, because of competition of the charge transfer model with the terminal model. II exhibited the same copolymn. behavior and its value of e was .apprx.-2 when using electron-rich comonomers where the Q-e scheme held. The reactivity ratios, from which values of e were calcd., were obtained using the integrated form of the copolymer equation and the proper nonlinear least-squares fitting technique. .