Richard, CJ;
Macmillan, D;
Hogarth, G;
(2018)
Microwave-assisted synthesis of cyclopentadienone iron tricarbonyl complexes: molecular structures of [{eta(4)-C4R2C(O)C4H8}Fe(CO)(3)] (R = Ph, 2,4-F2C6H3, 4-MeOC6H4) and attempts to prepare Fe(II) hydroxycyclopentadienyl-hydride complexes.
Transition Metal Chemistry
, 43
(5)
pp. 421-430.
10.1007/s11243-018-0229-1.
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Abstract
Microwave irradiation of 1,6-diynes, RC≡C(CH2)4C≡CR, with Fe(CO)5 in dimethylether leads to the facile and clean formation of cyclopentadienone complexes [{η4-C4R2C(O)C4H8}Fe(CO)3] in good yields resulting from a [2 + 2 + 1] cycloaddition. The molecular structures of three examples (R = Ph, 2,4-F2C6H3, 4-MeOC6H4) have been obtained. The addition of HBF4 leads to the clean and reversible formation of cationic hydroxycyclopentadienyl complexes [{η5-C4R2C(OH)C4H8}Fe(CO)3][BF4]. Sequential addition of hydroxide and acid has also been carried out in an attempt to prepare hydroxycyclopentadienyl–hydride complexes. These were largely unsuccessful but in one case a Shvo-type complex with a bridging hydride was detected by 1H NMR spectroscopy. Reasons for the differing behaviour of [{η4-C4(SiMe3)2C(O)C4H8}Fe(CO)3] and the related aryl-functionalised derivatives are considered.
| Type: | Article |
|---|---|
| Title: | Microwave-assisted synthesis of cyclopentadienone iron tricarbonyl complexes: molecular structures of [{eta(4)-C4R2C(O)C4H8}Fe(CO)(3)] (R = Ph, 2,4-F2C6H3, 4-MeOC6H4) and attempts to prepare Fe(II) hydroxycyclopentadienyl-hydride complexes |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1007/s11243-018-0229-1 |
| Publisher version: | https://doi.org/10.1007/s11243-018-0229-1 |
| Language: | English |
| Additional information: | This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
| Keywords: | Science & Technology, Physical Sciences, Chemistry, Inorganic & Nuclear, Chemistry, OPPENAUER-TYPE OXIDATION, LIGAND-EXCHANGE REACTION, RUTHENIUM COMPLEXES, TRANSFER HYDROGENATION, ASYMMETRIC CATALYSIS, REDUCTIVE AMINATION, CARBONYL-COMPLEXES, ORGANIC-SYNTHESIS, DIENE COMPLEXES, KETONES |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10054671 |
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