Tris(bipyridine)iron(II) chloride

Tris(bipyridine)iron(II) chloride
Identifiers
CAS Number	14751-83-8;
3D model (JSmol)	Interactive image;
ChemSpider	176367;
PubChem CID	203609;
	InChI InChI=1S/3C10H8N2.2ClH.Fe/c31-3-7-11-9(5-1)10-6-2-4-8-12-10;;;/h31-8H;2*1H;/q;;;;;+2/p-2 Key: GBRPARYPGGYWHF-UHFFFAOYSA-L;
	SMILES C1=CC=NC(=C1)C2=CC=CC=N2.C1=CC=NC(=C1)C2=CC=CC=N2.C1=CC=NC(=C1)C2=CC=CC=N2.[Cl-].[Cl-].[Fe+2];
Properties
Chemical formula	C30H24Cl2FeN6
Molar mass	595.31 g·mol−1
Appearance	red solid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tris(bipyridine)iron(II) chloride is the chloride salt of the coordination complex tris(bipyridine)iron(II), [Fe(C₁₀H₈N₂)₃]²⁺. It is a red solid. In contrast to tris(bipyridine)ruthenium(II), this iron complex is not a useful photosensitizer because its excited states relax too rapidly, a consequence of the primogenic effect.

Tris(bipyridine)iron(II) chloride features an octahedral Fe(II) center bound to three bipyridine ligands. The complex has been isolated as salts with many anions.^[1]

Synthesis and reactions

The sulfate salt [Fe(bipy)₃]SO₄ is produced by combining ferrous sulfate with excess bipy in aqueous solution.^[2] This result illustrates the preference of Fe(II) for bipyridine vs water. The potentials for |[Fe(bipy)₃]^2+/3+ and [Fe(phen)₃]^2+/3+ are very similar.^[3]

Addition of cyanide to an aqueous solution of [Fe(bipy)₃]SO₄ precipitates Fe(bipy)₂(CN)₂.^[4]

Related complexes

Tris(o-phenanthroline)iron(II)

References

^ Batten, Stuart R.; Murray, Keith S.; Sinclair, Nathan J. (2000). "Tris(2,2′-bipyridyl- N , N ′)iron(II) diperchlorate". Acta Crystallographica Section C Crystal Structure Communications. 56 (8): e320. Bibcode:2000AcCrC..56E.320B. doi:10.1107/S0108270100009185.
^ Avdeeva, Varvara V.; Vologzhanina, Anna V.; Goeva, Lyudmila V.; Malinina, Elena A.; Kuznetsov, Nikolay T. (2014). "Boron Cluster Anions [B_nH_n]^2– ( n = 10, 12) in Reactions of Iron(II) and Iron(III) Complexation with 2,2′-Bipyridyl and 1,10-Phenanthroline". Zeitschrift für Anorganische und Allgemeine Chemie. 640 (11): 2149–2160. doi:10.1002/zaac.201400137.
^ Wong, C. L.; Kochi, J. K. (1979). "Electron Transfer with Organometals. Steric Effects as Probes for Outer-Sphere and Inner-Sphere Oxidations of Homoleptic Alkylmetals with Iron(III) and Iridate(IV) Complexes". Journal of the American Chemical Society. 101 (19): 5593–5603. Bibcode:1979JAChS.101.5593W. doi:10.1021/ja00513a024.
^ Schilt, Alfred A. (1970). "Dicyanobis(1,10-phenanthroline)Iron(II) and Dicyanobis(2,2′-bipyridine)iron(II)". Inorganic Syntheses. Vol. 12. pp. 247–251. doi:10.1002/9780470132432.ch43. ISBN 978-0-470-13171-8.

[1] Batten, Stuart R.; Murray, Keith S.; Sinclair, Nathan J. (2000). "Tris(2,2′-bipyridyl- N , N ′)iron(II) diperchlorate". Acta Crystallographica Section C Crystal Structure Communications. 56 (8): e320. Bibcode:2000AcCrC..56E.320B. doi:10.1107/S0108270100009185.

[2] Avdeeva, Varvara V.; Vologzhanina, Anna V.; Goeva, Lyudmila V.; Malinina, Elena A.; Kuznetsov, Nikolay T. (2014). "Boron Cluster Anions [B_nH_n]^2– ( n = 10, 12) in Reactions of Iron(II) and Iron(III) Complexation with 2,2′-Bipyridyl and 1,10-Phenanthroline". Zeitschrift für Anorganische und Allgemeine Chemie. 640 (11): 2149–2160. doi:10.1002/zaac.201400137.

[3] Wong, C. L.; Kochi, J. K. (1979). "Electron Transfer with Organometals. Steric Effects as Probes for Outer-Sphere and Inner-Sphere Oxidations of Homoleptic Alkylmetals with Iron(III) and Iridate(IV) Complexes". Journal of the American Chemical Society. 101 (19): 5593–5603. Bibcode:1979JAChS.101.5593W. doi:10.1021/ja00513a024.

[4] Schilt, Alfred A. (1970). "Dicyanobis(1,10-phenanthroline)Iron(II) and Dicyanobis(2,2′-bipyridine)iron(II)". Inorganic Syntheses. Vol. 12. pp. 247–251. doi:10.1002/9780470132432.ch43. ISBN 978-0-470-13171-8.

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