Boron chemistry (English spelling)

Japanese: ホウ素化学(硼素化学) - ほうそかがく(英語表記)boron chemistry
Boron chemistry (English spelling)
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

Japanese:
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

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