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Molecular structures of the pentaphenylcyclopentadienyl iron complexes [(C5Ph5)Fe(CO)2R] (R = Me, Ph, iPr and Bu).

ABSTRACT: The PdII-catalysed reaction of [(C5Ph5)Fe(CO)2Br] with Grignard compounds RMgX or butyl lithium gave the iron alkyl/aryl complexes [(C5Ph5)Fe(CO)2R] (R = Me, Ph, iPr and Bu) in 59-73% yield, namely, dicarbonylmethyl(η5-pentaphenylcyclopentadienyl)iron, [Fe(CH3)(C35H25)(CO)2], dicarbonyl(η5-pentaphenylcyclopentadienyl)phenyliron, [Fe(C6H5)(C35H25)(CO)2], dicarbonyl(isopropyl)(η5-pentaphenylcyclopentadienyl)iron, [Fe(C3H7)(C35H25)(CO)2], and butyldicarbonyl(η5-pentaphenylcyclopentadienyl)iron, [Fe(C4H9)(C35H25)(CO)2]. The crystal structure determinations showed the usual `paddle-wheel' orientation of the phenyl rings, with an average canting angle of ca 50°. The bond parameters are mainly dictated by the steric requirements of the alkyl/aryl groups and only the phenyl complex shows electronic effects.

SUBMITTER: Sunkel K 

PROVIDER: S-EPMC8254530 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

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Molecular structures of the pentaphenylcyclopentadienyl iron complexes [(C<sub>5</sub>Ph<sub>5</sub>)Fe(CO)<sub>2</sub>R] (R = Me, Ph, iPr and Bu).

Sünkel Karlheinz K   Klein-Hessling Christian C  

Acta crystallographica. Section C, Structural chemistry 20210616 Pt 7

The Pd<sup>II</sup>-catalysed reaction of [(C<sub>5</sub>Ph<sub>5</sub>)Fe(CO)<sub>2</sub>Br] with Grignard compounds RMgX or butyl lithium gave the iron alkyl/aryl complexes [(C<sub>5</sub>Ph<sub>5</sub>)Fe(CO)<sub>2</sub>R] (R = Me, Ph, iPr and Bu) in 59-73% yield, namely, dicarbonylmethyl(η<sup>5</sup>-pentaphenylcyclopentadienyl)iron, [Fe(CH<sub>3</sub>)(C<sub>35</sub>H<sub>25</sub>)(CO)<sub>2</sub>], dicarbonyl(η<sup>5</sup>-pentaphenylcyclopentadienyl)phenyliron, [Fe(C<sub>6</sub>H<sub>5</  ...[more]

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