In covalent compounds, it is usually possible to allocate one (or more) electron pairs to a bond, i.e., between the bonded atoms. However, some compounds do not have enough electrons to do this, and are generally referred to as electron-deficient compounds. For example, compounds such as diborane, B 2 H 6 , and hexamethyldialuminum, Al 2 (CH 3 ) 6 , have the following skeletons, in which there are eight adjacent atom pairs in each case, but only six electron pairs are available for bonding: Source: Heibonsha World Encyclopedia, 2nd Edition Information |
共有性化合物では,一つの結合すなわち結合している原子間に,一つ(あるいはそれ以上)の電子対を割り当てることができるのが普通である。これに対し,そのようにするのには電子が不足している化合物があるが,これらを一般に電子不足化合物といっている。たとえばジボランB2H6およびヘキサメチル二アルミニウムAl2(CH3)6のような化合物では次のような骨格をもっており,隣り合った原子の組合せはいずれも八つあるのに,結合に使われる電子対の数は六つしかない。
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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