155107-89-4Relevant academic research and scientific papers
The donor properties of 1,8-bis(diphenylphosphino)-3,6-dioxaoctane towards cationic rhodium(I) salts revisited. X-Ray structural characterization of a quadridentate mode of bonding
Alvarez, Marie,Lugan, Noeel,Mathieu, Rene
, p. 249 - 256 (2007/10/02)
The + cation (dppoo=(Ph2PCH2CH2OCH2)2) reacts with chloroform at room temperature to give +, whose structure has been established by X-ray structural determination on .The dppoo ligand adopts a planar η4 mode of bonding, the two chlorine atoms being in the trans position. (2) reacts with dihydrogen at atmospheric pressure to give (4) in which dppoo adopts the same mode of bonding, as deduced from spectroscopic data.The formation of 4 involves the transient formation of unstable which has been detected by nuclear magnetic resonance (NMR) spectroscopy.Under carbon monoxide, (6) is formed, and is readily decarbonylated to (7) under vacuum.In 6, dppoo is trans bidentate.In 7, low temperature NMR experiments imply an equilibrium between η3 and η4 bonding for dppoo. 2 is a poor catalyst for the hydrogenation of alkynes and ketones and shows a low activity towards the hydroformylation of 1-hexene.Key words: Rhodium; Hydrogenation; Hydroformylation; Phosphine ether
