［Co(tren)(amino acidato-N,O)］X2·nH2O在溶液中的NMR研究

报道了配合物［Co(tren)(DL-phenylalaninato)］(ClO₄)₂ (Ⅰ)、Co(tren)(L-prolinato)］I₂·H₂O (Ⅱ)、［Co(tren) (L-valinato)］I₂·1/3H₂O (Ⅲ)、［Co(tren)(L-isoleucinato)］I₂ (Ⅳ)、［Co(tren) ( L-leucinato)］I₂ (Ⅴ) 在溶液中的NMR研究. 通过同核和异核二 维核磁共振实验归属了配合物的¹H和¹³C NMR ，发现在配合物的空间结构 中，四齿配体(tren)的3个螯合臂中有两个构象稳定，而另一个构象不稳定，这与晶体学数据吻合. 通过变温实验和溶剂效应实验，发现在配合物Ⅲ、Ⅳ、Ⅴ中存在分子内氢键，而在晶体结构中，所有配合物都存在分子间氢键. 配合物Ⅰ、Ⅱ在溶液中的行为需进一步的研究 .

NMR STUDIES OF COMPLEXES [Co(TREN)(AMINO ACIDATO-N,O)]X2·nH2O IN SOLUTION

NMR experiments at various temperature or with different solvents were used to characterize the nature of hydrogen bonds and conformation of several complexes in solution, namely the trans(N,t-N) isomer of Co(tren)(DL-phenylalaninato)](ClO-4)-2(Ⅰ), Co(tren)(L-pro-linato)]I-2H-2O(Ⅱ), Co(tren)(L-valinato)]I-2*1/3H-2O(Ⅲ), Co(tren)(L-isoleucinato)]I-2(Ⅳ), Co(tren)(L-leucinato)]I-2(Ⅴ). Compared with their crystal structures in which intermolecular double or single hydrogen bonds were observed. Intramolecular double or single hydrogen bonds formed by the carbonyl oxygen of the amino acidato ligand and the amino hydrogen of the tren ligand were observed in Ⅲ, Ⅳ, Ⅴ. While the situations in Ⅰ and Ⅱ need more investigations. The 1H and 13C NMR assignments were achieved by 2D NMR(COSY and HMQC ).