1H NMR study of the reversible cis / trans isomerization of {(μ-CH2)(μ-CO)[η5-C5H5Fe(CO)]2}

María Inés Altbach; César A. Muedas; Richard P. Korswagen; Manfred L. Ziegler

doi:10.1016/S0022-328X(00)98999-X

¹H NMR study of the reversible cis / trans isomerization of {(μ-CH₂)(μ-CO)[η⁵-C₅H₅Fe(CO)]₂}

María Inés Altbach, César A. Muedas, Richard P. Korswagen, Manfred L. Ziegler

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The cis / trans isomerization of the bridging methylene complex {(μ-CH₂)(μ-CO)[η⁵-C₅H₅-Fe(CO)]₂} was studied in solution by ¹H NMR spectrometry, using solvents with different polarities (acetone-d₆, chloroform-d₁ and benzene-d₆). Equilibrium constants and rate constants for the forward and reverse steps were measured between 278 and 323 k. Both reactions show first-order kinetics. A possible mechanism for the isomerization is proposed, involving the breaking of a FeFe bond in the rate-determining step.

Original language	English (US)
Pages (from-to)	375-383
Number of pages	9
Journal	Journal of Organometallic Chemistry
Volume	306
Issue number	3
DOIs	https://doi.org/10.1016/S0022-328X(00)98999-X
State	Published - Jun 3 1986
Externally published	Yes

ASJC Scopus subject areas

Biochemistry
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/S0022-328X(00)98999-X

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title = "1H NMR study of the reversible cis / trans isomerization of {(μ-CH2)(μ-CO)[η5-C5H5Fe(CO)]2}",

abstract = "The cis / trans isomerization of the bridging methylene complex {(μ-CH2)(μ-CO)[η5-C5H5-Fe(CO)]2} was studied in solution by 1H NMR spectrometry, using solvents with different polarities (acetone-d6, chloroform-d1 and benzene-d6). Equilibrium constants and rate constants for the forward and reverse steps were measured between 278 and 323 k. Both reactions show first-order kinetics. A possible mechanism for the isomerization is proposed, involving the breaking of a FeFe bond in the rate-determining step.",

author = "Altbach, {Mar{\'i}a In{\'e}s} and Muedas, {C{\'e}sar A.} and Korswagen, {Richard P.} and Ziegler, {Manfred L.}",

year = "1986",

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doi = "10.1016/S0022-328X(00)98999-X",

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T1 - 1H NMR study of the reversible cis / trans isomerization of {(μ-CH2)(μ-CO)[η5-C5H5Fe(CO)]2}

AU - Altbach, María Inés

AU - Muedas, César A.

AU - Korswagen, Richard P.

AU - Ziegler, Manfred L.

PY - 1986/6/3

Y1 - 1986/6/3

N2 - The cis / trans isomerization of the bridging methylene complex {(μ-CH2)(μ-CO)[η5-C5H5-Fe(CO)]2} was studied in solution by 1H NMR spectrometry, using solvents with different polarities (acetone-d6, chloroform-d1 and benzene-d6). Equilibrium constants and rate constants for the forward and reverse steps were measured between 278 and 323 k. Both reactions show first-order kinetics. A possible mechanism for the isomerization is proposed, involving the breaking of a FeFe bond in the rate-determining step.

AB - The cis / trans isomerization of the bridging methylene complex {(μ-CH2)(μ-CO)[η5-C5H5-Fe(CO)]2} was studied in solution by 1H NMR spectrometry, using solvents with different polarities (acetone-d6, chloroform-d1 and benzene-d6). Equilibrium constants and rate constants for the forward and reverse steps were measured between 278 and 323 k. Both reactions show first-order kinetics. A possible mechanism for the isomerization is proposed, involving the breaking of a FeFe bond in the rate-determining step.

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ER -

¹H NMR study of the reversible cis / trans isomerization of {(μ-CH₂)(μ-CO)[η⁵-C₅H₅Fe(CO)]₂}

Abstract

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