Heterotrinuclear complexes containing a hexaselenolato-zinc(II), -cadmium(II), -nickel(II) or -iron(II) core: crystal structures of [(OC)3Fe(μ-SePh)3M(μ-SePh)3Fe(CO)3] (M = Zn, Cd, Ni or Fe) and [Fe(CO)2(phen)(SePh)2] (phen = 1,10-phenanthroline)
- 1 January 1998
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 3,p. 353-358
- https://doi.org/10.1039/a705247b
Abstract
A series of linear trinuclear selenolate complexes of the general type [(OC)3Fe(µ-SePh)3M(µ-SePh)3Fe(CO)3] (M = ZnII 1, CdII 2, NiII 3 or FeII 4) has been synthesized by reaction of the appropriate [M(H2O)n]2+ with the chelating metalloligand fac-[N(PPh3)2][Fe(CO)3(SePh)3] in acetonitrile. Their structures were elucidated on the basis of IR, UV/VIS, NMR spectra and X-ray crystallography. Compounds 1–4 are structurally related, each containing two tridentate metalloligands resulting in a MSe6 co-ordination environment of virtual Oh symmetry. Further reaction of 4 with 3 equivalents of 1,10-phenanthroline (phen) initially afforded the intermediate [Fe(phen)3][Fe(CO)3(SePh)3]2 but eventually neutral [Fe(CO)2(phen)(SePh)2] 5 was formed as the sole product. Its crystal structure has been determined. This investigation shows that fac-[Fe(CO)3(SePh)3]– serves as a tridentate chelating metalloligand and selenolate ligand-transfer reagent.Keywords
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