…When a molecule or chemical bond has a bias in the distribution of electric charge, it is said to have polarity, and is called a polar molecule or a polar bond, respectively. A substance made of polar molecules is called a polar compound, a liquid is called a polar liquid, or a polar solvent, and a polar substituent is called a polar group. Polar molecules have a dipole moment and a relatively large dielectric constant, and their liquids dissolve other polar molecules and ionic compounds well. … From [Polar Liquid]…For example, the ⊿ S v of water and ethyl alcohol are 109,110 J/K・mol, respectively. When a polar liquid is used as a solvent, it is called a polar solvent. Polar compounds are easily soluble in polar solvents. … *Some terminology explanations that mention "polar solvent" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…分子または化学結合において電荷分布に偏りがあるとき極性があるといい,それぞれ極性分子polar molecule,極性結合polar bondと呼ぶ。また極性分子からなる物質を極性化合物,液体を極性液体polar liquid,あるいは極性溶媒polar solventと呼び,極性のある置換基を極性基と称する。極性分子は双極子モーメントをもち,誘電率が比較的大きく,その液体は他の極性分子やイオン結合化合物をよく溶かす。… 【極性液体】より…たとえば,水,エチルアルコールの⊿Svはそれぞれ109,110J/K・molである。極性液体が溶媒として用いられるときは極性溶媒polar solventとよばれる。極性化合物は極性溶媒に溶けやすい。… ※「polar solvent」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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