464199-66-4Relevant academic research and scientific papers
Formation of 18e- and 16e- acyl(η3-cyclooctenyl)rhodium(III) complexes in the reaction of cationic (cycloocta-1,5-diene)rhodium(I) compounds with 2-(diphenylphosphino)benzaldehyde
El Mail, Rachad,Garralda, Maria A.,Hernandez, Ricardo,Ibarlucea, Lourdes,Pinilla, Elena,Torres, M. Rosario
, p. 1485 - 1495 (2007/10/03)
The reaction of cationic diolefinic rhodium(I) complexes with 2-(diphenylphosphino)benzaldehyde (pCHO) was studied. [Rh(cod)2]CIO4 (cod = cycloocta-1,5-diene) reacted with pCHO to undergo the oxidative addition of one pCHO with (1,2,3-η)cyclooct-2-en-1-yl(η3- C8H13) formation, and the coordination of a second pCHO molecule as (phosphino-κP)aldehyde-κO(σ-coordination) chelate to give the 18e- acyl(allyl)rhodium(III) species [Rh(η3-C8H13)(pCO)(pCHO)]ClO4 (see 1). Complex 1 reacted with [Rh(cod)(PR3)2]ClO4 (R = aryl) derivatives 3-6 to give stable pentacoordinated 16e- acyl[(1,2,3-η)-cyclooct-2-en-1-yl]rhodium(III) species [Rh(η3-C8H13) (pCO)(PR3)]ClO4 7-10. Tim (1,2,3-η)-cyclooct-2-en-1-yl complexes contain cis-positioned P-atoms and were fully characterized by NMR, and the molecular structure of 1 was determined by X-ray crystal diffraction. The rhodium(III) complex 1 catalyzed the hydroformylation of hex-1-ene and produced 98% of aldehydes (n/iso = 2.6).
