分散
发表于 2025-3-27 00:26:58
profile and reactivity features. This book is not only an indispensable resource for advanced undergraduate and graduate students studying the stereochemical aspects of organic reactions, but also a good reference book for all organic chemists in both industry and academia..978-3-030-75624-6978-3-030-75622-2
delegate
发表于 2025-3-27 04:42:44
http://reply.papertrans.cn/88/8775/877418/877418_32.png
释放
发表于 2025-3-27 06:10:57
Steric and Stereoelectronic Control of Molecular Structures and Organic Reactions,conformational effects in ethane, butane, cyclohexane, variously substituted cyclohexanes, and .- and .-decalins allow a good understanding of the discussions that follow. The application of these effects to E2 and E1cB reactions followed by the anomeric effect and mutarotation is discussed. The con
Lacunar-Stroke
发表于 2025-3-27 12:53:44
http://reply.papertrans.cn/88/8775/877418/877418_34.png
无瑕疵
发表于 2025-3-27 16:02:57
Diastereoselectivity in Organic Reactions,nh–Felkin modification of Cram’s model, Houk’s transition state model, Houk’s electrostatic model, Cieplak’s σ → σ*# model, and cation coordination model. The intricacies, variations, and predicted selectivities are elaborated with examples. It has been argued that Cieplak’s σ → σ*# model is applica
小口啜饮
发表于 2025-3-27 19:12:19
A(1,2) and A(1,3) Strains, reactions such as - and -sigmatropic shifts, intramolecular S.2 reactions, hydroboration, and enolate alkylation is highlighted. The high diastereoselectivity observed in the reactions of enolates derived from 4-substituted .-alkanoyl-1,3-oxazolidinones (Evans enolates) with electrophiles
Anticoagulants
发表于 2025-3-27 23:27:40
,The Conservation of Orbital Symmetry Rules (Woodward–Hoffmann Rules),the symmetry characteristics of σ, σ*, π, and π* molecular orbitals. This is followed by a discussion of molecular orbitals and their symmetry characteristics for allyl cation, allyl radical, allyl anion, and 1,3-butadiene. The symmetry concept is applied to π. + π., π. + π., and electrocyclic ring
厨房里面
发表于 2025-3-28 05:52:28
http://reply.papertrans.cn/88/8775/877418/877418_38.png
macabre
发表于 2025-3-28 08:23:03
Torquoselectivity of Conrotatory Ring Opening in 3-Substituted Cyclobutenes,or .-double bond. The inward or outward rotation of the substituent, called torquoselectivity, depends on its electronic nature. A sufficiently electron-withdrawing substituent is known to rotate inward and, likewise, electron-rich or electron-donating substituent outward. There is no known exceptio
迷住
发表于 2025-3-28 10:45:44
Hammett Substituent Constants, more difficult by electron-rich substituents on the aromatic ring. The effect on ionization is also dependent on the position of the substituent on the ring in respect of the carboxylic acid group. While substituents on the . and . positions exert only electronic effects on ionization, substituents