Chan, Antony PY ORCID: 0000-0002-4518-9463, Rosair, Georgina M and Welch, Alan J ORCID: 0000-0003-4236-2475
(2020)
Exopolyhedral Ligand Orientation Controls Diastereoisomer in Mixed-Metal Bis(carboranes).
Molecules (Basel, Switzerland), 25 (3).
E519-.
Text
Exopolyhedral Ligand Orientation Controls Diastereoisomer in Mixed-Metal Bis(carboranes).pdf - Published version Download (1MB) | Preview |
Abstract
Heterobimetallic derivatives of a bis(carborane), [μ<sub>7,8</sub>-(1',3'-3'-Cl-3'-PPh<sub>3</sub>-<i>closo</i>-3',1',2'-RhC<sub>2</sub>B<sub>9</sub>H<sub>10</sub>)-2-(<i>p</i>-cymene)-<i>closo</i>-2,1,8-RuC<sub>2</sub>B<sub>9</sub>H<sub>10</sub>] (<b>1</b>) and [μ<sub>7,8</sub>-(1',3'-3'-Cl-3'-PPh<sub>3</sub>-<i>closo</i>-3',1',2'-RhC<sub>2</sub>B<sub>9</sub>H<sub>10</sub>)-2-Cp-<i>closo</i>-2,1,8-CoC<sub>2</sub>B<sub>9</sub>H<sub>10</sub>] (<b>2</b>) have been synthesised and characterised, including crystallographic studies. A minor co-product during the synthesis of compound <b>2</b> is the new species [8-{8'-2'-H-2',2'-(PPh<sub>3</sub>)<sub>2</sub>-<i>closo</i>-2',1',8'-RhC<sub>2</sub>B<sub>9</sub>H<sub>10</sub>}-2-Cp-<i>closo</i>-2,1,8-CoC<sub>2</sub>B<sub>9</sub>H<sub>10</sub>] (<b>3</b>), isolated as a mixture of diastereoisomers. Although, in principle, compounds <b>1</b> and <b>2</b> could also exist as two diastereoisomers, only one (the same in both cases) is formed. It is suggested that the preferred exopolyhedral ligand orientation in the rhodacarboranes in the non-observed diastereoisomers would lead to unacceptable steric crowding between the PPh<sub>3</sub> ligand and either the <i>p</i>-cymene (compound <b>1</b>) or Cp (compound <b>2</b>) ligand of the ruthenacarborane or cobaltacarborane, respectively.
Item Type: | Article |
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Uncontrolled Keywords: | Boranes, Models, Molecular |
Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
Depositing User: | Symplectic Admin |
Date Deposited: | 14 Jul 2021 10:35 |
Last Modified: | 26 Jan 2024 13:17 |
DOI: | 10.3390/molecules25030519 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3129992 |