Synthesis of a bis(oxazoline)-N-carboxylate ligand and its Zn(II) complex that shows C-H center dot center dot center dot Cl hydrogen bonding
SCIE
SCOPUS
- Title
- Synthesis of a bis(oxazoline)-N-carboxylate ligand and its Zn(II) complex that shows C-H center dot center dot center dot Cl hydrogen bonding
- Authors
- Kang, YS; Son, JH; Hwang, IC; Ahn, KH
- Date Issued
- 2006-11-03
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Abstract
- An efficient synthesis of a novel N3O-type chelate and its Zn(II) complex is described. The Zn(II) complex shows C-H center dot center dot center dot Cl-Zn hydrogen bonding both in the solid and solution states. The chelate, (S,S)-[bis{(4-isopropyl-4,5-dihydrooxazol-2-yl)methyl}amino]acetic acid sodium salt, is a new and branched type of N3O ligand, featuring C-2-symmetric bis(oxazoline)-N-carboxylate. A key step of the ligand synthesis involved a stepwise introduction of the oxazoline rings to suppress side products otherwise resulted from one-step approach. Treatment of the sodium bis(oxazoline)-N-carboxylate with ZnCl2 and subsequent removal of NaCl resulted in the corresponding Zn(II) complex. The Zn(II) complex showed an unusual downfield shift by the isopropyl methine protons on its H-1 NMR spectrum, which suggests the C-H center dot center dot center dot Cl-Zn hydrogen bonding. An X-ray crystallographic analysis of the single crystals of the Zn(II) complex supports the C-H center dot center dot center dot Cl-Zn hydrogen bonding, showing a microchannel structure that encapsulates a linear array of chloroform molecules through other intermolecular hydrogen bonding interactions. (C) 2006 Elsevier Ltd. All rights reserved.
- Keywords
- tetradentate ligand; hydrogen bond; oxazoline; Zn(II) complex; ALPHA-AMINO-ACIDS; CRYSTAL-STRUCTURE; METAL-COMPLEXES; COORDINATION; CATALYSIS; H...O
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/23756
- DOI
- 10.1016/j.poly.2006.05.011
- ISSN
- 0277-5387
- Article Type
- Article
- Citation
- POLYHEDRON, vol. 25, no. 15, page. 3025 - 3031, 2006-11-03
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.