Molecular structures of M(II) chelates with compartmental (N,N)-, (N,O)- and (N,S)-donor ligands and articulated metal chelate cycles

Abstract

Molecular structures of various d-element M(II) ion chelates with compartmental (N,N)-, (N,O)-, and (N,S)-donor atomic ligands forming as a result of complexing with M(II) three or four articulated metal chelate cycles have been systematized and discussed in detail. It has been shown that, on the whole, such metalmacrocyclic compounds, as a rule, have molecular structures with non-coplanar chelate nodes and non-coplanar macrocycles. The review covers the period 2000–2017.

Synthesis, Characterization, and Copper(II) Chelates of 1,11-Dithia-4,8-diazacyclotetradecane

“…Mixed N, S-containing macrocyclic ligands continue to be of significant interest due to their metal chelate coordination and redox properties with d-block elements . The property of the [14]­aneN 2 X 2 series (X = S or O) to chelate both hard and soft metals has been reported throughout the literature with recently reporting as biological CO 2 - and proton-reducing agents, MRI contrast agents, positron emission tomography imaging, anticancer agents, nitric oxide sensors, and as a scaffold for cryptand formation .…”