The research presented herein focuses on controlling the coordination environment of Mn, Fe, and Co in coordination complexes with the ligand N-2-pyridylimidoyl-2-pyridylamidine (Py₂ImAm), which possesses both a bidentate and tridentate coordinating site. The synthesis and characterization of seven new metallic complexes are described, and these results indicate that the key factor dictating which coordination site of Py₂ImAm the metal ion prefers is the presence (or absence) of a weak acid. More specifically, the presence of a weak acid directs the metal ion to the tridentate site of Py₂ImAm, while neutral or basic conditions lead to coordination complexes in which the metal center is bound to the bidentate pocket.

中文翻译：

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N -2-吡啶基亚甲基-2-吡啶基idine啶的配位化学的探索：具有多个配位位点的多功能配体。

本文提出的研究集中于控制与配体N -2-吡啶基酰亚胺基-2-吡啶基lam啶（Py ₂ ImAm）配位的络合物中Mn，Fe和Co的配位环境，该配体同时具有二齿和三齿配位位点。描述了七个新的金属配合物的合成和表征，这些结果表明，决定金属离子偏爱Py ₂ ImAm哪个配位点的关键因素是弱酸的存在（或不存在）。更具体地说，弱酸的存在将金属离子引导到Py ₂ ImAm的三齿位点，而中性或基本条件会导致配位络合物，其中金属中心被束缚在双齿袋中。