Abstract New macrocyclic lactones were synthesized by reaction of 3-bromo-5-(5-tert-butyl-2- hydroxybenzyl) biphenyl-4-ol with appropriate polyethylene glycol-based dicarboxylic acid dichlorides, and their complexes with Mg (ClO 4) 2· 6H 2 O, Pb (SCN) 2, NaClO 4· H 2 O, and KClO 4 were prepared. The macrocyclic ligands were evaluated as extractants in the transfer of Li+, Na+, K+, Cu 2+, Ni 2+, and Hg 2+ picrates from aqueous to organic phase.
![2,2'-[oxybis(ethyleneoxy)]bisacetyl dichloride Structure](https://image.chemsrc.com/caspic/112/31255-25-1.png)
![2-[2-(2-chloro-2-oxoethoxy)ethoxy]acetyl chloride Structure](https://image.chemsrc.com/caspic/374/31255-09-1.png)