6533b7d8fe1ef96bd126b560

RESEARCH PRODUCT

Crystalline Non‐Equilibrium Phase of a Cobalt(II) Complex with Tridentate Ligands

Christoph FörsterUte KolbVadim KsenofontovKatja HeinzeTatiana Gorelik

subject

Inorganic ChemistryCrystallographyEquilibrium phaseElectron diffractionTransition metalChemistryPrecipitation (chemistry)Metal ions in aqueous solutionchemistry.chemical_elementKinetic energyCobaltIsomerization

description

In six-coordinate complexes, flexible tridentate ligands enable mer, cis-fac, and trans-fac stereoisomers. With labile metal ions of the first transition metal series, typically only the final thermodynamic product is available because of the rapid isomerization processes. Here we report on the structural characterization of a so far elusive kinetic intermediate of [Co(ddpd)2](BF4)2 (1; ddpd = N,N′-dimethyl-N,N′-dipyridine-2-yl-pyridine-2,6-diamine). Microcrystals of the cis-fac isomer of 1 were obtained by rapid precipitation. The solid-state structure of cis-fac-1 was determined from electron diffraction data.

https://doi.org/10.1002/ejic.201403200