Structural and Dynamic Properties of the Pentahapiocyclopentadienylmetal Dicarbonyl Dimers

J. G. Bullitt; F. A. Cotton; T. J. Marks

doi:10.1021/ic50110a001

Structural and Dynamic Properties of the Pentahapiocyclopentadienylmetal Dicarbonyl Dimers

J. G. Bullitt, F. A. Cotton^*, T. J. Marks

^*Corresponding author for this work

Chemistry

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

147 Scopus citations

Abstract

The 100-MHz pmr and infrared spectra between 1700 and 2100 cm^-1 of [(h⁵-C₅H₅)Fe(CO)₂]₂ and [(h⁵-C₅H₅)Ru(CO)₂]₂ have been investigated as functions of solvent and temperature. There are four isomers present in solutions of the ruthenium compound: cis bridged (I), trans bridged (III), trans nonbridged (IV), and a polar nonbridged structure (probably V). The thermodynamic and kinetic data measured in nonpolar solvents are consistent with the nonbridged isomers as intermediates in the interconversion of I and III. The approximate kinetic activation parameters for the I III process in the iron compound have been evaluated from the temperature dependence of the pmr spectrum.

Original language	English (US)
Pages (from-to)	671-676
Number of pages	6
Journal	Inorganic chemistry
Volume	11
Issue number	4
DOIs	https://doi.org/10.1021/ic50110a001
State	Published - Apr 1 1972

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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title = "Structural and Dynamic Properties of the Pentahapiocyclopentadienylmetal Dicarbonyl Dimers",

abstract = "The 100-MHz pmr and infrared spectra between 1700 and 2100 cm-1 of [(h5-C5H5)Fe(CO)2]2 and [(h5-C5H5)Ru(CO)2]2 have been investigated as functions of solvent and temperature. There are four isomers present in solutions of the ruthenium compound: cis bridged (I), trans bridged (III), trans nonbridged (IV), and a polar nonbridged structure (probably V). The thermodynamic and kinetic data measured in nonpolar solvents are consistent with the nonbridged isomers as intermediates in the interconversion of I and III. The approximate kinetic activation parameters for the I III process in the iron compound have been evaluated from the temperature dependence of the pmr spectrum.",

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T1 - Structural and Dynamic Properties of the Pentahapiocyclopentadienylmetal Dicarbonyl Dimers

AU - Bullitt, J. G.

AU - Cotton, F. A.

AU - Marks, T. J.

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Y1 - 1972/4/1

N2 - The 100-MHz pmr and infrared spectra between 1700 and 2100 cm-1 of [(h5-C5H5)Fe(CO)2]2 and [(h5-C5H5)Ru(CO)2]2 have been investigated as functions of solvent and temperature. There are four isomers present in solutions of the ruthenium compound: cis bridged (I), trans bridged (III), trans nonbridged (IV), and a polar nonbridged structure (probably V). The thermodynamic and kinetic data measured in nonpolar solvents are consistent with the nonbridged isomers as intermediates in the interconversion of I and III. The approximate kinetic activation parameters for the I III process in the iron compound have been evaluated from the temperature dependence of the pmr spectrum.

AB - The 100-MHz pmr and infrared spectra between 1700 and 2100 cm-1 of [(h5-C5H5)Fe(CO)2]2 and [(h5-C5H5)Ru(CO)2]2 have been investigated as functions of solvent and temperature. There are four isomers present in solutions of the ruthenium compound: cis bridged (I), trans bridged (III), trans nonbridged (IV), and a polar nonbridged structure (probably V). The thermodynamic and kinetic data measured in nonpolar solvents are consistent with the nonbridged isomers as intermediates in the interconversion of I and III. The approximate kinetic activation parameters for the I III process in the iron compound have been evaluated from the temperature dependence of the pmr spectrum.

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Structural and Dynamic Properties of the Pentahapiocyclopentadienylmetal Dicarbonyl Dimers

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