Synthesis and Evaluation of the Bonding Properties of a Potentially Tridentate Ligand: 1-(Diphenylphosphino)-2-ethoxy-1-(2-pyridyl)ethane

DOI: 10.1039/DT9940002755

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 2755 - 2760 (1994)

Update date:2022-09-26

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Authors:

Alvarez, Marie

Lugan, Noeel

Mathieu, Rene

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Article abstract of DOI:10.1039/DT9940002755

The trifunctional ligand 1-(diphenylphosphino)-2-ethoxy-1-(2-pyridyl)ethane (pepye) has been prepared and its bonding properties toward Mo(0), Rh(I) and Ru(II) metallic centres evaluated.The complex fac- in which the ligand is P,N,O bonded in solution evolves to cis- where it is P,N bonded.In the complex ClO4 (cod = cycloocta-1,5-diene) the ligand is P,N bonded.The cycloocta-1,5-diene can be displaced by carbon monoxide, and ClO4 and <2>2 have been isolated.In the former the ligand is P,N bonded and in the latter the two rhodium atoms are bridged by the phosphine and ether functions of each ligand.The complex all-cis- has been isolated in two diastereoisomeric forms in a 6:4 ratio.In polar solvents it evolves to (1+) in which one of the ligands is P,N,O bonded and the two diastereoisomers have been isolated as their tetraphenylborate salts.The bonded ether arm of the ligand can be displaced by carbon monoxide leading to BPh4.This reaction can be reversed in boiling acetone, more or less easily, depending upon the diastereoisomers.

Full text of DOI:10.1039/DT9940002755

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