Fig. 4. Crystal structure of 1 in the HS state at 170 K (a and b); in the ordered MS state at 80 K (c and d, by slow cooling); and in the LS state at 80 K (e and f, by rapid quenching and annealing), showing the coordination environment of Fe (a, c and e) and the 2D double-layer (b, d and f) connected by Au⋯Au interactions. Color codes: Fe(HS), red; Fe(LS), blue; Au, yellow; N, cyan; C, gray. H atoms are omitted and the back layer is faded out for clarity.
