A μ3-sulfide bridged triiron cluster(II,II,III) supported by a cyclophane ligand undergoes metal-based reduction to yield an all-ferrous species. The latter complex incorporates a three-coordinate iron center that provides an accessible coordination site to a solvent molecule.
![Graphical abstract: A three-coordinate Fe(ii) center within a [3Fe–(μ3-S)] cluster that provides an accessible coordination site](http://hg.y866.cn/compound/lib/scimg/usr/1/C6CC04671A.jpg)
