-Di-aqua-tetra-kis-(tetra-hydro-furan-κ)iron(II) μ-carbonyl-tetra-deca-carbonyl-tetra-chlorido-μ-di-methyl-silanediolato-tetra-galliumtetra-iron(7 -)(-) tetra-hydro-furan tetrasolvate.

The title compound, [Fe(CHO)(HO)][FeGa(CHOSi)Cl(CO)]·4CHO, consists of an iron(II) cation octa-hedrally coordinated by two water mol-ecules () with four tetra-hydro-furans (THF) at equatorial sites. Two additional THF mol-ecules are hydrogen bonded to each of the water mol-ecules. The dianion of the title compound is an organometallic butterfly complex with a dimethyl siloxane core and two iron-gallium fragments. The lengths of the iron to gallium metal-metal bonds range from 2.3875 (6) to 2.4912 (6) Å.