Chemistry dealing with boron (B) compounds. Boron is the first element in group IIIB of the periodic table, but it has only a few commonalities with the other group IIIB elements below aluminum, and is more similar to silicon in group IVB. Boron has 3 valence electrons ((2s) 2 (2p) 1 ), but its high ionization energy makes it difficult for it to become a cation, and it is more likely to form covalent bonds. Covalent bonds are formed by sp 2 hybrid orbitals, and it is easy to form planar triangular molecules such as BF 3 , BCl 3 , and BBr 3 . Source: Heibonsha World Encyclopedia, 2nd Edition Information |
ホウ素Bの化合物を取り扱う化学。ホウ素は周期表第IIIB族の第1に位置する元素であるが,アルミニウム以下の他のIIIB族元素とはわずかな共通点があるだけで,むしろIVB族のケイ素に似ている。ホウ素の原子価電子数は3((2s)2(2p)1)であるが,イオン化エネルギーが高くて陽イオンとはなりにくく,むしろ共有結合をつくりやすい。共有結合はsp2混成軌道によるもので,たとえばBF3,BCl3,BBr3などのように平面三角形の分子をつくりやすい。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
>>: Wrapping paper - Hosoyoushi
...As one of the founding fathers of the United S...
An old town in Kitatsuru County, on the eastern ed...
…Madagascar jasmine S. floribunda Brongn. is an e...
Also called Alaska pollock (Palaeocod), mentai (a ...
…In the 17th century, art dealers flourished in P...
A religious city in central Iraq. The capital of ...
[Born] February 27, 1622 Midan Beemster Died Octob...
Located in Daigogaran-cho, Fushimi-ku, Kyoto City...
...This view of the state can be seen as a positi...
… [Physical Symbol Hypothesis] The hypothesis tha...
A long, narrow corridor that bends and surrounds ...
...The number of moltings varies depending on the...
Abbreviation for Petróleos Brasileiros, SA, the Br...
A traditional silk fabric produced in the area al...
1114‐62 Count of Barcelona. Reigned 1131-62. In 11...