Macrocyclic multidentate ligands for metal ion complexation

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Title: Macrocyclic multidentate ligands for metal ion complexation
Author: Pugia, Michael Joseph
Abstract: Synthetic methods for the preparation of novel multidentate ligands and the assessment of metal ion complexation by these ligands are described in this dissertation . The molecular structure of the multidentate ligands is systematically varied to provide a better understanding of the process of molecular complexation . Crowns ethers (macrocyclic polyethers ) with a hydroxyl and an alkyl group linked directly to the central carbon of a three carbon bridge are synthesized in one step reactions of glycol and bisphenol dianions with substituted epichlorohydrins . Crown ethers bearing two hydroxymethyl functions are prepared from benzyl -protected and allyl -protected precursors . Synthetic pathways have been established for the preparation from crown ether alcohols of crown ethers with lonizable sulfonic , phosphonic and carboxylic acid pendant arms . Neutral amide - and ester -containing pendant arms are attached to crowns by reactions with crown acid chlorides . A series of novel bis -crown ethers result from condensations of diacid chlorides with crown alcohols . Acyclic tropolone ligands are prepared by reaction of calcium tropolone with 1 ,3 -ditosyloxypropanes .
URI: http : / /hdl .handle .net /2346 /16318
Date: 1986-12


Macrocyclic multidentate ligands for metal ion complexation. Doctoral dissertation, Texas Tech University. Available electronically from http : / /hdl .handle .net /2346 /16318 .

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