Hypopnea
发表于 2025-3-23 11:24:57
Rearrangements,erial and the product of the Claisen rearrangement are molecules that can be isolated. The ring expansion reaction shown in . and the alkyne synthesis depicted in . are examples of multistep rearrangement reactions.
omnibus
发表于 2025-3-23 15:44:34
Textbook 2010cts, a language for all time, a language that explains where we came from, what we are, and where the physical world will allow us to go. Chemical Language has great esthetic beauty and links the physical sciences to the b- logical sciences. ” from The Two Cultures: Chemistry and Biology by Arthur K
凶猛
发表于 2025-3-23 21:04:07
Radical Substitution Reactions at the Saturated C Atom,hich a substituent X that is bound to an ..-hybridized C atom is replaced by a group Y via radical intermediates. Radicals are usually short-lived atoms or molecules. They contain one or more unpaired electrons. You should already be familiar with at least two radicals, which by the way are quite st
草本植物
发表于 2025-3-23 22:34:57
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诱惑
发表于 2025-3-24 06:03:14
,-Eliminations,emoved in such a way that they do not become constituents of same molecule. In other eliminations, they become attached to one another such that they leave as a molecule of type X-Y or X=Y or as X≡Y. The atoms or groups X and Y can be bound to C atoms and/or to heteroatoms in the substrate. These at
Observe
发表于 2025-3-24 08:36:54
Substitution Reactions on Aromatic Compounds,tic precursors is considerably less important. Via substitution reactions, electrophiles and nucleophiles can be introduced into aromatics. A series of mechanisms is available for this. Those that are discussed in this chapter are listed in ..
outer-ear
发表于 2025-3-24 10:50:19
Nucleophilic Substitution Reactions at the Carboxyl Carbon,s are part of a carbonyl group, C.=O. Carboxylic acids, carboxylic esters, and carboxylic amides, as well as all carboxylic acid derivatives used as acylating agents (see Section 6.3) are termed collectively as . and are thereby distinguished from the carbonyl compounds. They contain a carboxyl grou
aspect
发表于 2025-3-24 17:50:49
Carboxylic Compounds, Nitriles, and Their Interconversion,H. → R-C≡N + H.O is associated with a enthalpy change of +19 kcal/mol. The dehydration of carboxylic acids (R-C(=O)-OH → R-C(=O)-O-C(=O)-R + H.O), leads to the formation of carboxylic acid anhydrides. This process is only half as endothermic (Δ. = +9 kcal/mol), due to the fact that the dehydration o
旧病复发
发表于 2025-3-24 20:00:37
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尾随
发表于 2025-3-25 03:10:14
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