A new sulfonamide derivative as magnesium ion receptor: N-tosyl-2,6-diisopropyl-4-(2,3-dimethoxylbenzoylamide)aniline
摘要:
N-Tosyl-2,6-diisopropyl-4-(2,3-dimethoxylbenzoylamide)aniline (1) has been synthesized and its metal ion (Na+, K+, Ca2+, Mg2+) coordinating properties investigated by FT-IR, ESI-MS, and H-1 NMR methods. Among the tested metal ions, the overall stability constant (log K) for Mg2+ (6.89) is the highest (Na+, 5.64; K+, 5.43; Ca2+, 5.51)in 10% water/THF at 25.0 +/- 0.5 degrees C determined by UV-vis spectroscopy, indicating that 1 is a potent ionophore for Mg2+ ion. (C) 2009 Elsevier Ltd. All rights reserved.
A Novel Al-Bridged Trinuclear Iron(II) Bis(imino)pyridyl Complex with Catalytic Ethylene Polymerization Behavior
作者:Zerong Long、Zhongquan Li、Ning Ma、Biao Wu
DOI:10.5012/bkcs.2011.32.8.2537
日期:2011.8.20
performed to confirm the formation of a novel trinuclear bis(imino)pyridyl iron(II) complex (4) upon addition of FeCl2 into Al-bridged ligand 3 in methanol solution. Simultaneously, a typical bis(imino)pyridine-iron(II) complex (2) was synthesized and fully characterized. The X-ray crystal study of the iron(II) complex2 disclosed a five-coordinate, distorted squarepyramidal structure with the tridentate
合成了一种自组装的铝桥联二亚氨基吡啶基配体 (3),并通过 FT-IR、ESI-MS 和 NMR 光谱对其进行了表征。进行电子光谱滴定以确认在将 FeCl2 添加到甲醇溶液中的铝桥配体 3 中后形成新型三核双(亚氨基)吡啶基铁 (II) 络合物 (4)。同时,合成并充分表征了典型的双(亚氨基)吡啶-铁(II)络合物(2)。铁 (II) 配合物 2 的 X 射线晶体研究揭示了具有三齿 N^N^N 配体和氯化物的五配位扭曲方锥结构。通过分子力学得到4的最佳分子结构,表明配合物4中的每个铁原子被两个氯化物、一个三齿N^N^N配体和一个氧原子包围,支持考虑来自 MMAO 或乙烯通道的六坐标几何形状的可能性。4 与参考 2 的比较显示催化活性和 MMAO 消耗显着降低(活性高达 0.41 × 10 3 kg molFe -1 h -1 bar -1 ,对于 4 和 7.02 × 10 3,Al/Fe
A new sulfonamide derivative as magnesium ion receptor: N-tosyl-2,6-diisopropyl-4-(2,3-dimethoxylbenzoylamide)aniline
N-Tosyl-2,6-diisopropyl-4-(2,3-dimethoxylbenzoylamide)aniline (1) has been synthesized and its metal ion (Na+, K+, Ca2+, Mg2+) coordinating properties investigated by FT-IR, ESI-MS, and H-1 NMR methods. Among the tested metal ions, the overall stability constant (log K) for Mg2+ (6.89) is the highest (Na+, 5.64; K+, 5.43; Ca2+, 5.51)in 10% water/THF at 25.0 +/- 0.5 degrees C determined by UV-vis spectroscopy, indicating that 1 is a potent ionophore for Mg2+ ion. (C) 2009 Elsevier Ltd. All rights reserved.