| 词汇 | lone-pair |
| 释义 | BETA lone paircollocation in Englishmeanings of loneand pairThese words are often used together. Click on the links below to explore the meanings. lone adjective[ before noun ] uk /ləʊn/ us /loʊn/ alone: See more at lone pair noun[ C ] uk /peər/ us /per/ two things of the same appearance and size that are intended to be used together, or something that consists of two parts ... See more at pair Examples of lone pairlone pair Lonepair bond pair repulsions change the bond angle from the tetrahedral angle to a slightly lower value. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The main requirement is that aside from the lonepair, the other three substituents differ mutually. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A lonepair of electrons resides on the sulfur atom giving it tetrahedral molecular geometry as for sp carbon. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In contrast, boron trifluoride is flat, adopting a trigonal planar geometry because the boron does not have a lonepair of electrons. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Consequently, there is no lonepair near the acid group to stabilize the molecule. It occurs when a molecule has a steric number of 5, with the central atom being bonded to 4 other atoms and 1 lonepair. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Nevertheless, the lonepair of the nitrogen, responsible of the zwitterionic structure, stabilizes the structure and is responsible of the linearity of isocyanides. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This transition state can be stabilized through induction or delocalization of the electron lonepair through resonance. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The s-orbital lonepair can be hybridised with the p-orbital bond. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The lonepair of electrons present on the oxygen or sulphur attack the electropositive carbonyl carbon. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When this occurs, the pi-bond of the electrophile is converted into a lonepair on the oxygen. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When this occurs, the pi-bond of the amide is converted into a lonepair, creating a negatively charged oxygen. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In non-basic aromatic rings the lonepair of electrons of the nitrogen atom is delocalized and contributes to the aromatic pi electron system. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It contains six pi electrons: four from two double bonds and two from a nitrogen lonepair. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Whereas the lonepair on nitrogen is delocalized in pyrrole, the lonepair on phosphorus atom in the phosphorus equivalent of pyrrole (phosphole) is not. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. 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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