Magnetic superexchange switching by transformation of trigonal bipyramid into square pyramid in Cu(II)-nitroxide complex

The reaction of Cu(hfac) 2 and imino nitroxide 2-(pyridin-4-yl)-4,4,5,5,5-tetramethyl-4,5-dihydro-1 H -imidazol-1-oxyl (IN) gives the complex [Cu 2 (hfac) 4 (IN)] n ( 1 ), which has the structure of a chain-polymer with side branches. IN, acting as a μ 3 -O,N,N-tridentate ligand,...