| 词汇 | olefin |
| 释义 | BETA Examples of olefinolefin isn’t in the Cambridge Dictionary yet. You can help! Note the addition of a restraining olefin (double bond) bridge in (g). The chemoselective ruthenium-catalysed olefin metathesis reaction was used to 'staple' together the two alkene tethers to provide peptides that maintain helical structure, but with enhanced stability. This model seems to be valid despite substitution on the olefin. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Furthermore, with the exception noted above, a given dialkyl tartrate will preferentially add to the same face independent of the substitution on the olefin. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Olefin is abrasion, stain, sunlight, fire, and chemical resistant. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Approaches to this synthesis are diverse, and include central steps such as annululation, olefin metathesis, radical cyclization, and trapping reactions. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Terminal olefins are converted to the corresponding alkyl bromides and alkyl iodides by treating the organoborane intermediates with bromine or iodine. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Trisubstituted olefins can rapidly produce dialkyl boranes, but further alkylation of the organoboranes is slowed because of steric hindrance. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These electron-donating groups make the olefin nucleophilic enough to attack electrophilic initiators or growing polymer chains. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Enones, or electron-poor olefins, were discovered to react via a radical-anion pathway, utilizing diisopropylethylamine as a transient source of electrons. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It may contain higher concentrations of olefins, oxygen, and nitrogen than conventional crude oil. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They are also known as thiiranes, olefin sulfides, thioalkylene oxides, and thiacyclopropanes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The configuration of the olefin is retained in the cycloaddition product. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Moreover, few unwanted by products are formed, such as olefins. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The simplest type of molecules which exhibit allylic strain are olefins. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is generally believed that vinyl iodide can not survive common reduction conditions, which reduces the vinyl iodide to an olefin or unsaturated alkane. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The reverse of olefin insertion into a metal-hydrogen bond is -hydride elimination. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Some of these materials are cotton, wool, nylon, acrylic, polyester, olefins, (such as polypropylene), or spandex. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Prior to entering the reaction section, the olefin and isobutane feed are treated in a coalescer to remove water, sulfur and other contaminants. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For example, using olefin polymerization catalysts, copolymers can be formed with ethylene or styrene by polymerizing only the norbornene double bond. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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