Table 1.

Metal - Metal distances within the Fe(II) cylinders.

Fe(II) cylinder	Fe(II)-Fe(II) distance
1 (PF6− salt) [81]	11.413(1) Å
6a [78]	11.391(3) Å
6b	12.182(3) Å
6c	12.234(1) Å
6d [78]	9.8777(7) Å
6f	14.579(4) Å
8	11.246(2) Å