| 词汇 | multiple-bond |
| 释义 | BETA multiple bondcollocation in Englishmeanings of multipleand bondThese words are often used together. Click on the links below to explore the meanings. multiple noun[ C ] uk /ˈmʌl.tɪ.pəl/ us /ˈmʌl.tə.pəl/ a number that can be divided by a smaller number an exact number ... See more at multiple bond noun uk /bɒnd/ us /bɑːnd/ a close connection joining two or ... See more at bond Examples of multiple bondmultiple bond As the fluid velocity increases, it becomes difficult to observe arrests by single bonds, so that only multiplebond events are detected. Although nitrile anions are functionally similar to enolates, the extra multiplebond in nitrile anions provides them with a unique ketene-like geometry. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Substrates with stereocenters "between" the radical and multiplebond are often highly stereoselective. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Typically, a single bond is a sigma bond while a multiplebond is composed of one sigma bond together with pi or other bonds. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Metals, too, can engage in multiple bonding in a metal ligand multiplebond. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The two ends of the multiplebond constitute two possible sites of reaction. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The radical cyclization step usually involves the attack of a radical on a multiplebond. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. An amine always has three single bonds, whereas an isocyanide has only one single and one multiplebond. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When the multiplebond is polarized by an electron-withdrawing group, selective addition results. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Attack at the carbon atom of the multiplebond is almost always observed. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This means that the behavior of multiple bonds in parallel cannot be simply extrapolated from single bond measurements. The enhanced strength of a multiplebond versus a single (sigma bond) is indicated in many ways, but most obviously by a contraction in bond lengths. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Here we will discuss two different scenarios : namely, multiple bonds in series and multiple bonds in parallel. In the processes of forming complex organic molecules, reactive species possessing unsaturated multiple bonds play an important role. Because adhesion between extended surfaces is determined by the dynamic equilibrium of multiple bonds, surface detachment is not determined by a single kinetic event - that is, single bond dissociation. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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