Determination of coordination sites in polyether phosphoryl ligands using model compounds

Abstract

1. The oxide of the macrocyclic phosphine and its acyclic analog have been synthesized, as well as complexing agents of the monopodand type. 2. By using model compounds it has been shown that when the phosphoryl-containing macrocycle complexes with the lithium ion, the phosphoryl group oxygen and, apparently, the central ethereal oxygen, participate in the coordination. For ions of greater radius, the ether oxygens only are involved. 3. In the phosphoryl-containing podands, coordination with the lithium ion via the phosphoryl groups is preferred. In complex formation with ions of larger radii, the ether oxygens participate in the coordination.