Modulating the Primary and Secondary Coordination Spheres within a Series of Co^II-OH Complexes.

ABSTRACT: The interplay between the primary and secondary coordination spheres is crucial to determining the properties of transition metal complexes. To examine these effects, a series of trigonal bipyramidal Co-OH complexes have been prepared with tripodal ligands that control both coordination spheres. The ligands contain a combination of either urea or sulfonamide groups that control the primary coordination sphere through anionic donors in the trigonal plane and the secondary coordination sphere through intramolecular hydrogen bonds. Variations in the anion donor strengths were evaluated using electronic absorbance spectroscopy and a qualitative ligand field analysis to find that deprotonated urea donors are stronger field ligands than deprotonated sulfonamides. Structural variations were found

SUBMITTER: Jones JR 

PROVIDER: S-EPMC5693292 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature