A bisâtrisurea ligand assembles with the tetraalkylammonium halides to form the flat âstaveâ structures or âbarrelsâ that encapsulate multiple R4N+ guests, depending on the size of the halide anion (Clâ or Brâ) and the R4N+ cation.
Reactions of Diamines with Isocyanates and Isothiocyanates
作者:OLIVER STOUTLAND、LON HELGEN、COURTLAND L. AGRE
DOI:10.1021/jo01088a022
日期:1959.6
BLYUM R. A.; LUTSENKO V. V., ZH. BCEC. XIM. O-BA, 1979, 24, HO 3, 310
作者:BLYUM R. A.、 LUTSENKO V. V.
DOI:——
日期:——
Anion Coordination of Bis-bisurea Ligands: Aggregation of Dihydrogen Phosphate Anion into Oligomers and Infinite Chains
作者:Biao Wu、Cuirong Huo、Shaoguang Li、Yanxia Zhao、Xiao-Juan Yang
DOI:10.1002/zaac.201500243
日期:2015.8
alkanediyl-spaced bis-bisurea ligands ( L 2 – L 4 ) were synthesized and their anion coordination behavior studied. These ligands form interesting complexes with polymeric and oligomeric dihydrogen phosphate aggregates in the solid state. The ligands L 2 and L 3 coordinate with H 2 PO 4 – anions to form a unique molecular “necklace” with an infinite (H 2 PO 4 – ) n chain and surrounding ligand molecules. Meanwhile
合成了一系列链烷二基间隔的双脲配体(L 2 – L 4 )并研究了它们的阴离子配位行为。这些配体与固态的聚合和低聚磷酸二氢聚集体形成有趣的复合物。配体 L 2 和 L 3 与 H 2 PO 4 – 阴离子配位,形成独特的分子“项链”,具有无限 (H 2 PO 4 – ) n 链和周围的配体分子。同时,在配体L 3 的配合物中观察到两种不同的磷酸二氢盐-水低聚物,(H 2 PO 4 ) 6 · (H 2 O) 4 和(H 2 PO 4 ) 4 · (H 2 O) 2 。和 L 4 。此外,通过 1 H NMR 和 UV/Vis 光谱研究了配体的溶液阴离子结合特性。