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A SF5 Derivative of Triphenylphosphine as an Electron-Poor Ligand Precursor for Rh and Ir Complexes.


ABSTRACT: The synthesis of the triarylphosphine, P(p-C6H4SF5)3 containing a SF5 group, has been achieved. The experimental and theoretical studies showed that P(p-C6H4SF5)3 is a weaker ?-donor when compared with other substituted triarylphosphines, which is consistent with the electron-withdrawing effect of the SF5 moiety. The studies also revealed a moderate air stability of the phosphine. The ?-donor capabilities of P(p-C6H4SF5)3 were estimated from the phosphorus-selenium coupling constant in SeP(p-C6H4SF5)3 and by DFT calculations. The behavior of P(p-C6H4SF5)3 as ligand has been investigated by the synthesis of the iridium and rhodium complexes [MCl(COD){P(p-C6H4SF5)3}], [MCl(CO)2{P(p-C6H4SF5)3}2] (M = Ir, Rh), or [Rh(µ-Cl)(COE){P(p-C6H4SF5)3}]2, and the molecular structures of [IrCl(COD){P(p-C6H4SF5)3}] and [Rh(µ-Cl)(COE){P(p-C6H4SF5)3}]2 were determined by single X-ray diffraction. The structures revealed a slightly larger cone angle for P(p-C6H4SF5)3 when compared to other para-substituted triarylphosphines.

SUBMITTER: Talavera M 

PROVIDER: S-EPMC7504798 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature

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A SF<sub>5</sub> Derivative of Triphenylphosphine as an Electron-Poor Ligand Precursor for Rh and Ir Complexes.

Talavera Maria M   Hinze Silke S   Braun Thomas T   Laubenstein Reik R   Herrmann Roy R  

Molecules (Basel, Switzerland) 20200901 17


The synthesis of the triarylphosphine, P(<i>p</i>-C<sub>6</sub>H<sub>4</sub>SF<sub>5</sub>)<sub>3</sub> containing a SF<sub>5</sub> group, has been achieved. The experimental and theoretical studies showed that P(<i>p</i>-C<sub>6</sub>H<sub>4</sub>SF<sub>5</sub>)<sub>3</sub> is a weaker σ-donor when compared with other substituted triarylphosphines, which is consistent with the electron-withdrawing effect of the SF<sub>5</sub> moiety. The studies also revealed a moderate air stability of the pho  ...[more]

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