Inorganic−Organic Hybrid Molecular Ribbons Based on Chelating/Bridging, 'Pincer' Tetraphosphonates, and Alkaline-Earth Metals

Syntheses and structures of alkaline earth metal ions and EDTMP, ethylenediamine-tetrakis(methylenephosphonate), are reported. The isostructural Ca2+ and Sr2+ analogs have 1D topologies, with EDTMP acting as both chelating and bridging ligand. The M-EDTMP compounds act as Fe-oxide removers from corroded surfaces.