Condensation of formaldehyde with chelated glycine and ethylenediamine: a new macrocycle synthesis; X-ray structures of [α-hydroxymethylserine-bis(ethylenediamine)cobalt(III)]2+ and [α-hydroxymethylserine-1,4,8,11-tetra-aza-6,13-dioxacyclotetradecanecobalt(III)]2+ ions

Abstract

Condensation of formaldehyde with glycinatobis-(ethylenediamine)cobalt(III) ion yields in turn [α-hydroxymethylserinebis(ethylenediamine)cobalt(III)]²⁺ and the macrocycle [α-hydroxymethylserine-1,4,8,11-tetra-aza-6,13-dioxacyclotetradecanecobalt(III)]²⁺, the structures of which have been established by X-ray structural analysis.