Tetramesityldiiron

Tetramesityldiiron
Names
	Other names dimesityliron
Identifiers
CAS Number	158100-80-2; (monomer): 59774-47-9;
3D model (JSmol)	(monomer): Interactive image;
PubChem CID	(monomer): 12826882;
	InChI (monomer): InChI=1S/2C9H11.Fe/c21-7-4-8(2)6-9(3)5-7;/h24-5H,1-3H3;/q2*-1;+2 Key: JEIASHLOEHTPQS-UHFFFAOYSA-N;
	SMILES (monomer): c1(C)cc(C)cc(C)c1[Fe]c2c(C)cc(C)cc2(C);
Properties
Chemical formula	C36H44Fe2
Appearance	red solid
Density	1.19 g/cm3
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tetramesityldiiron is an organoiron compound with the formula Fe₂(C₆H₂(CH₃)₃)₄. It is a red, air-sensitive solid that is used as a precursor to other iron complexes. It adopts a centrosymmetric structure.[1] The complex is a Lewis acid, forming monomeric adducts, e.g. Fe(C₆H₂(CH₃)₃)₂pyridine₂. The complex is prepared by treating ferrous halides with the Grignard reagent formed from mesityl bromide:[2][3]

2 FeCl₂ + 4 BrMgC₆H₂(CH₃)₃ → Fe₂(C₆H₂(CH₃)₃)₄ + 2 MgBrCl

References

Müller, Hardy; Seidel, Wolfgang; Görls, Helmar (1993). "Chemistry of dimesityliron. VI. The structure of tetramesityldiiron". Journal of Organometallic Chemistry. 445: 133–6. doi:10.1016/0022-328X(93)80198-K.
Klose, Alain; Solari, Euro; Floriani, Carlo; Chiesi-Villa, Angiola; Rizzoli, Corrado; Re, Nazzareno (1994). "Magnetic Properties Diagnostic for the Existence of Iron(II)-Iron(II) Bonds in Dinuclear Complexes Which Derive from Stepwise Insertion Reactions on Unsupported Iron-Aryl Bonds". J. Am. Chem. Soc. 116 (20): 9123–9135. doi:10.1021/ja00099a030.
Martinez, Gabriel Espinosa; Killion, Jack A.; Jackson, Bailey J.; Fout, Alison R. (2018). Dimesityliron(II) Dimer and Dimesityldipyridineiron(II) (Mes = mesityl = C₆H₂-2,4,6-Me₃) Crowded σ- and π-Bonded Metal Aryl Complexes. Inorganic Syntheses. Vol. 36. pp. 50–55. doi:10.1002/9781119477822.ch4. S2CID 104749729.

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[1] Müller, Hardy; Seidel, Wolfgang; Görls, Helmar (1993). "Chemistry of dimesityliron. VI. The structure of tetramesityldiiron". Journal of Organometallic Chemistry. 445: 133–6. doi:10.1016/0022-328X(93)80198-K.

[2] Klose, Alain; Solari, Euro; Floriani, Carlo; Chiesi-Villa, Angiola; Rizzoli, Corrado; Re, Nazzareno (1994). "Magnetic Properties Diagnostic for the Existence of Iron(II)-Iron(II) Bonds in Dinuclear Complexes Which Derive from Stepwise Insertion Reactions on Unsupported Iron-Aryl Bonds". J. Am. Chem. Soc. 116 (20): 9123–9135. doi:10.1021/ja00099a030.

[3] Martinez, Gabriel Espinosa; Killion, Jack A.; Jackson, Bailey J.; Fout, Alison R. (2018). Dimesityliron(II) Dimer and Dimesityldipyridineiron(II) (Mes = mesityl = C₆H₂-2,4,6-Me₃) Crowded σ- and π-Bonded Metal Aryl Complexes. Inorganic Syntheses. Vol. 36. pp. 50–55. doi:10.1002/9781119477822.ch4. S2CID 104749729.