C2-SYMMETRICAL RUTHENOCENE DIPHOSPHINE LIGANDS ONLY WITH SURFACE CHIRALITY AND THEIR MANUFACTUREThe invention affords C 2 -symmetrical ruthenocene diphosphine ligands with surface chirality and their manufacture. The present invention uses (S)—(S)-1,1′-2(diphenylphosphino)-2,2′-2[(S)-4-...
C2-symmetrical bis ruthenium Diphosphine Ligand only with surface chiralitydoi:CN1876668 AThe invention relates the synthesis of C2-bis ruthenium doublephosphine ligand. The ligand can be used in metallic catalysis asymmetric reaction, and the ligand has the good reaction active and stereoselectivity. ...
Chiral and C2 -Symmetrical Bis(oxazolinylpyridine)fhodium(III) Complexes: Effective Catalysts for Asymmetric Hydrosilylation of Ketones, Nishiyama, et al. (Organometallics, 1989, 846-848).Nishiyama H, Sakaguchi H, Nakamura T, Horihata, M, Kondo M, Itoh K, Chiral and C2-symmetrical bis(...
ChemInform Abstract: Enantioselective Preparation of C2-Symmetrical 1,4-Diols.stereochemistry (general, optical resolution)alcohols (acyclic compounds)ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ...
Toward a four-toothed molecular bevel gear with C _2-symmetrical rotors Toward a Four-Toothed Molecular Bevel Gear with C2-Symmetrical Rotors. Chen-Yi Kao,Ya-Ting Hsu,Hsiu-Feng Lu,Ito Chao,Shou-Ling Huang,Ying-Chih Lin,Wei-Ting Sun,Jye-Shane Yang. Journal of Organic Chemistry . 2011Kao ...
The straightforward synthesis of a double-lasso macrocycle from a nonsymmetrical [c2]daisy chain, using the copper(I)-catalyzed Huisgen alkyne-azide 1,3-dipolar cycloaddition, is described. The preparation of the nonsymmetrical alkyne azide [c2]daisy chain precursor was realized in situ via the ...
Aesthetics in Translation——Symmetrical Beauty of Sentences 汉语的整饬美 起源于汉魏,形成于南北朝的骈文,讲究双句(以俪句、偶句为主),讲究对仗、声律和藻饰。柳宗元在《乞巧文》中用这样的语言赞美骈文“骈四俪六,锦心绣口”。 一起来品析一下具有“...
1. Based on the equivalent current method,the operation performance of the motor is studied and the symmetrical operation condition is set up. 基于等效电流法,对三绕组单相感应电动机的运行性能进行研究,建立三绕组对称运行的条件,分析匹配电容对电机性能的影响。
Reductive pinacol homocoupling of 15 ac, induced by vanadium complex 11 or niobium complex 16 in refluxing THF, yields C2-symmetrical (S,R,R,S)-configurated 6a, 6b and 2, respectively, with moderate to high stereoselectivity (Scheme 4). In a novel protocol for the preparation and ...
The symmetrical-to-asymmetrical transformer has an asymmetrical input (E0) to an upper track. Two conductor tracks (11,12) are mounted one on top of each other with gaps on a substrate with an earth plane. Each conductor has a side reactive arm (11s,12s). The far end of each track ha...