DOI: 10.1515/znb-1989-0605. Preparation and Spectroscopic Characterization of trans-Fe(CO)3L1L2 (L1, L2 = Phosphine or Phosphite)

Preparation and Spectroscopic Characterization of trans-Fe(CO)3L1L2 (L1, L2 = Phosphine or Phosphite)

10.1515/znb-1989-0605

Crossref journal-article

Walter de Gruyter GmbH

Zeitschrift für Naturforschung B (374)

Abstract

The 57Fe Mößbauer spectra of mixed ligand complexes of the type trans-Fe(CO)3L1L2 (L1 = triphenylphosphine or triphenylphosphite and L2 = phosphine or phosphite) show a quadrupolesplitting doublet typical of the disubstituted iron carbonyls in trigonal bipyramidal symmetry. The inverse linear dependence of the isomer shifts on the CO stretching frequencies is interpreted on the basis of the strengthening triple-bond nature of the carbonyl ligands with increasing iron-to-phosphorus π-back donation. A linear correlation, with a positive slope, between the isomer shifts and the quadrupole splittings has revealed that the phosphorus-to-iron σ-donation is offset by the iron-to-phosphorus π-back donation. A correlation between the coordination shifts and the isomer shifts demonstrates that the iron-to-phosphorus π-back donation plays an important role in the Fe-P bond. The relatively large coupling constant of 2J(P,P) reflects a strong interaction between trans-phosphorus ligands through the P-Fe-P bond

Bibliography

Inoue, H., Kuroiwa, T., Shirai, T., & Fluck, E. (1989). Preparation and Spectroscopic Characterization of trans-Fe(CO)3L1L2 (L1, L2 = Phosphine or Phosphite). Zeitschrift FÃ¼r Naturforschung B, 44(6), 641â646.

Authors 4

Hidenari Inoue (first)
Takeshi Kuroiwa (additional)
Tsuneo Shirai (additional)
Ekkehard Fluck (additional)

References 0 Referenced 7

None

Dates

Type	When
Created	10 years, 5 months ago (March 4, 2015, noon)
Deposited	4 years, 2 months ago (June 22, 2021, 7:02 p.m.)
Indexed	1 year, 10 months ago (Oct. 22, 2023, 2:20 a.m.)
Issued	36 years, 2 months ago (June 1, 1989)
Published	36 years, 2 months ago (June 1, 1989)
Published Online	11 years, 2 months ago (June 2, 2014)
Published Print	36 years, 2 months ago (June 1, 1989)

Funders 0

None

BibTeX

@article{Inoue_1989, title={Preparation and Spectroscopic Characterization of trans-Fe(CO)3L1L2 (L1, L2 = Phosphine or Phosphite)}, volume={44}, ISSN={0932-0776}, url={http://dx.doi.org/10.1515/znb-1989-0605}, DOI={10.1515/znb-1989-0605}, number={6}, journal={Zeitschrift für Naturforschung B}, publisher={Walter de Gruyter GmbH}, author={Inoue, Hidenari and Kuroiwa, Takeshi and Shirai, Tsuneo and Fluck, Ekkehard}, year={1989}, month=jun, pages={641–646} }

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  "abstract": "<jats:p>The <jats:sup>57</jats:sup>Fe M\u00f6\u00dfbauer spectra of mixed ligand complexes of the type trans-Fe(CO)<jats:sub>3</jats:sub>L<jats:sup>1</jats:sup>L<jats:sup>2</jats:sup> (L<jats:sup>1</jats:sup> = triphenylphosphine or triphenylphosphite and L<jats:sup>2</jats:sup> = phosphine or phosphite) show a quadrupolesplitting doublet typical of the disubstituted iron carbonyls in trigonal bipyramidal symmetry. The inverse linear dependence of the isomer shifts on the CO stretching frequencies is interpreted on the basis of the strengthening triple-bond nature of the carbonyl ligands with increasing iron-to-phosphorus \u03c0-back donation. A linear correlation, with a positive slope, between the isomer shifts and the quadrupole splittings has revealed that the phosphorus-to-iron \u03c3-donation is offset by the iron-to-phosphorus \u03c0-back donation. A correlation between the coordination shifts and the isomer shifts demonstrates that the iron-to-phosphorus \u03c0-back donation plays an important role in the Fe-P bond. The relatively large coupling constant of <jats:sup>2</jats:sup>J(P,P) reflects a strong interaction between trans-phosphorus ligands through the P-Fe-P bond</jats:p>",
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