124154-37-6

Upstream product

• 105139-41-1 RhCl(C₂H₄){CH₃C(CH₂P(C₆H₅)2)3} 
• 12092-47-6 di-μ-chloro-bis(1,5-cyclooctadiene)dirhodium 
• 22031-12-5 [2-((diphenylphospino)methyl)-2-methyl-1,3-propanediyl]bis[diphenylphosphine] 

Downstream Products

• 55172-29-7 thallium chloride 
• 405072-79-9 [Rh(H)2(quinoline-κN)(triphos-κ3P)]PF6 

Relevant academic research and scientific papers

Tetraethylborate as an ethyl transfer reagent

Reaction of NaBEt4 with RhCl(C2H4)(triphos) (I), where triphos is MeC(CH2PPh2)3, gives RhH-(C2H4)(triphos). Coordinated 13C2H4 in labeled I is liberated during the reaction, proving that NaBEt4 is the source of the ethylene coordinated in the product. Compound I reacts at 1 atm and 25°C with 13C2H4 or H2 to give RhCl(13C2H4)(triphos) or Rh(H)2Cl(triphos), respectively. It is proposed that all three reactions proceed by a mechanism in which one arm of the triphos ligand in I dissociates to yield a planar RhCl-(C2H4)(η2-triphos) transient. Both five-coordinate species RhX(C2H4)(triphos) (X = H, Cl) are unusual in showing relatively high barriers for both phosphorus site exchange and olefin rotation. In contrast to the reaction of I with NaBEt4, the reaction with NaBPh4 stops at Rh(η2-triphos) (η6-PhBPh3) and shows no further conversion to RhPh(C2H4)(triphos).

Tripodal polyphosphine ligands in homogeneous catalysis. 1. Hydrogenation and hydroformylation of alkynes and alkenes assisted by organorhodium complexes with MeC(CH2PPh2)3

This paper describes the synthesis and the chemical-physical properties of a number of new mononuclear organorhodium complexes of triphos. A detailed study on the hydrogenation reactions of various alkenes and alkynes and on the hydroformylation reactions of alkenes has been carried out. Also, the study compares and contrasts the catalytic activity of complexes containing participative ligands with that of (i) related mononuclear species containing non-participative ligands, and (ii) related dirhodium complexes.