For example, CoCl 3 and NH 3 each satisfy the usual valence (these are called primary compounds), but still combine to form the stable ammoniated CoCl 3 ・6NH 3 (called a higher compound). CW Blomstrand (1826-97) of Sweden proposed a chain structure similar to the CH 2 chain of organic compounds (Figure 1), and SM Jørgensen improved it (Figure 2), but he was unable to explain experimental results such as the presence of two types of chloride ions when precipitation of AgCl is made with silver nitrate. A. Werner gave up on the classical valence theory and in 1893 published the framework of the coordination theory, which states that molecules and other elements are arranged around a metal atom in a spatially fixed position specific to that atom to form the first sphere (or coordination sphere) (Figure 3). *Some of the terminology that mentions "Blomstrand, CW" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…たとえばCoCl3もNH3もそれぞれふつうの原子価を満足している(これらは一次化合物と呼ばれた)のに,なお結合して安定なアンモニア和物CoCl3・6NH3(高次化合物と呼ばれた)を生ずる。スウェーデンのブロムストラントC.W.Blomstrand(1826‐97)は有機化合物のCH2連鎖に類似した鎖状構造式(図1)を提出し,ヨルゲンセンS.M.Jørgensenはこれを改良した(図2)が,硝酸銀によってAgClの沈殿をつくるときに2種類の塩素イオンが存在することなどの実験結果を説明することはできなかった。A.ウェルナーは古典的な原子価論で説明することを断念し,1893年,金属原子を中心にして分子などがその原子特有の空間的に定まった位置に配列して第1圏(あるいは配位圏)をつくるという配位説の骨格となる理論を発表した(図3)。… ※「Blomstrand,C.W.」について言及している用語解説の一部を掲載しています。 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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