Effect of Ligand Field on Cations Forming Complexes and the HSAB Principle

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Other Title
  • 錯体を作る沈殿インヒビターが陽イオンの配位子場に及ぼす影響とHSAB則
  • 第66回材料と環境討論会 講演大会論文 錯体を作る沈殿インヒビターが陽イオンの配位子場に及ぼす影響とHSAB則
  • ダイ66カイ ザイリョウ ト カンキョウ トウロンカイ コウエン タイカイ ロンブン サクタイ オ ツクル チンデン インヒビター ガ ヨウイオン ノ ハイイシジョウ ニ オヨボス エイキョウ ト HSABソク

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Abstract

<p>Effect of ligand field on cation forming complexes with precipitation inhibitors for metallic corrosion in aerated neutral solution are discussed based on the hard and soft acids and bases （HSAB） principle. The energy levels of three 3d orbitals, dxy, dxz and dyz in Fe3＋, for example, decrease and two orbitals, dx2－y2 and dz2 increase markedly by approaching an effective ligand, ：CN－, resulting in the formation of d2sp3 hybrid orbital. Contrary, less effective ligand like ：NH3 provides sp3d2 hybrid orbital. Because chelating agents enhance the ligand field effect markedly, the d2sp3 hybrid orbital of Fe3＋ can be provided for the formation of chelate compound, resulting in stable coordinate bonds between hard acid and hard base.</p>

Journal

  • Zairyo-to-Kankyo

    Zairyo-to-Kankyo 69 (5), 137-139, 2020-05-10

    Japan Society of Corrosion Engineering

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