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A heterocyclic compound or ring structure is a cyclic compound that has atoms of at least two different elements as members of its ring(s). [1] Heterocyclic organic chemistry is the branch of organic chemistry dealing with the synthesis, properties, and applications of organic heterocycles .
In organic chemistry, a hemiacetal is a functional group the general formula R 1 R 2 C(OH)OR, where R 1, R 2 is a hydrogen atom or an organic substituent. They generally result from the nucleophilic addition of an alcohol (a compound with at least one hydroxy group ) to an aldehyde ( R−CH=O ) or a ketone ( R 2 C=O ) under acidic conditions.
Compounds containing rings with five atoms in them. ... Thiazoles (5 C, 126 P) Thiazolidines (1 C, 25 P) Thiazolines (1 C, 10 P) Thiolanes (8 P) Thiophenes (4 C, 130 P)
Pages in category "Heterocyclic compounds with 5 rings" The following 108 pages are in this category, out of 108 total. This list may not reflect recent changes .
A cyclic compound or ring compound is a compound in which at least some its atoms are connected to form a ring. [1] Rings vary in size from three to many tens or even hundreds of atoms. Examples of ring compounds readily include cases where: all the atoms are carbon (i.e., are carbocycles),
Earth may have had a ring made up of a broken asteroid over 400 million years ago, a study finds. The Saturn-like feature could explain a climate shift at the time.
The cyclic hemiacetal isomers are more prevalent in solution and are of two types: the pyranoses, which feature six-membered C 5 O rings, and the furanoses, which feature five-membered C 4 O rings (with a pendant CH 2 OH group). Each of these rings is subject to further isomerism, depending on the relative orientation of the anomeric hydroxy group.
The pyranose ring is formed by the reaction of the hydroxyl group on carbon 5 (C-5) of a sugar with the aldehyde at carbon 1. This forms an intramolecular hemiacetal.If reaction is between the C-4 hydroxyl and the aldehyde, a furanose is formed instead. [1]