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Capitolo 11

Eteri, epossidi e solfuri

Struttura e nomenclatura degli eteri
Struttura e nomenclatura degli eteri
Structure and Bonding Ethers are organic compounds with an ether functional group which is characterized by an oxygen atom connected to two — ...
Proprietà fisiche degli eteri
Proprietà fisiche degli eteri
Overview An ether molecule has a net dipole moment due to the polarity of C–O bonds. Subsequently, boiling points of ethers are lower than those of ...
Dagli alcoli agli eteri: disidratazione degli alcoli e sintesi di Williamson degli eteri
Dagli alcoli agli eteri: disidratazione degli alcoli e sintesi di Williamson degli eteri
Overview Ethers can be prepared from organic compounds by various methods. Some of them are discussed below, Preparation of Ethers by Alcohol Dehydration ...
Eteri da alcheni: addizione alcolica e alcossimercurazione-demercurazione
Eteri da alcheni: addizione alcolica e alcossimercurazione-demercurazione
Overview Ethers can also be prepared from alkenes through acid-catalyzed addition of alcohols and alkoxymercuration–demercuration. Preparation of ...
Da eteri ad alogenuri alchilici: scissione acido-catalizzata
Da eteri ad alogenuri alchilici: scissione acido-catalizzata
Ethers are generally unreactive and unsuitable for direct nucleophilic substitution reactions since the alkoxy groups are strong bases and, therefore, ...
Autossidazione di eteri a perossidi e idroperossidi
Autossidazione di eteri a perossidi e idroperossidi
Ethers represent a class of chemical compounds that become more dangerous with prolonged storage because they tend to form explosive peroxides when ...
Gli eteri corona
Gli eteri corona
Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by ...
Struttura e nomenclatura degli epossidi
Struttura e nomenclatura degli epossidi
Cyclic ethers are heterocyclic compounds with an oxygen atom in the ring along with carbon atoms. They are named depending on the number of carbon atoms ...
Preparazione degli epossidi
Preparazione degli epossidi
Overview Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin ...
Epossidazione di Sharpless
Epossidazione di Sharpless
The conversion of allylic alcohols into epoxides using the chiral catalyst was discovered by K. Barry Sharpless and is known as Sharpless epoxidation. The ...
Apertura dell'anello degli epossidi acido-catalizzata
Apertura dell'anello degli epossidi acido-catalizzata
Epoxides that are three-membered ring systems are more reactive than other cyclic and acyclic ethers. The high reactivity of epoxides originates from the ...
Apertura dell'anello degli epossidi base-catalizzata
Apertura dell'anello degli epossidi base-catalizzata
Due to their highly strained structures, epoxides can readily undergo ring-opening reactions through nucleophilic substitution, either in the presence of ...
Struttura e nomenclatura di tioli e solfuri
Struttura e nomenclatura di tioli e solfuri
Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are ...
Preparazione e reazioni dei tioli
Preparazione e reazioni dei tioli
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane ...
Preparazione e reazioni dei solfuri
Preparazione e reazioni dei solfuri
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups ...
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