The tetrahedral geometry of four-coordinate carbon atoms is a steadfast property of organic compounds. Nevertheless, chemists are still attracted to the possibility of twisting or squashing a ...

Do unusual geometries always come from the force exerted by a protein, a solid-state lattice or bulky ligands? In a new iron(II) complex, simple ligands stabilize a square-planar high-spin complex ...

Osaka, Japan – The arrangement of small molecules – known as ligands – around transition metal atoms affects how the metal atoms behave. This is important because transition metals are used as ...

The field of spin transition has been dominated by six-coordinate octahedral metal ions, but now an unusual spin transition has been found for an oxide containing a square-planar coordinate iron(II).