105154-79-8

Basic information

• Product Name: [(CH3C(CH2PPh2)3)Rh(η(2)-C2H4)(H)]
• Synonyms: [(CH3C(CH2PPh2)3)Rh(η(2)-C2H4)(H)]
• CAS NO: 105154-79-8
• Molecular Weight: 756.649
• Mol File: 105154-79-8.mol

Chemical Properties

• CAS DataBase Reference: [(CH3C(CH2PPh2)3)Rh(η(2)-C2H4)(H)](CAS DataBase Reference)
• NIST Chemistry Reference: [(CH3C(CH2PPh2)3)Rh(η(2)-C2H4)(H)](105154-79-8)
• EPA Substance Registry System: [(CH3C(CH2PPh2)3)Rh(η(2)-C2H4)(H)](105154-79-8)

Safety Data

• Hazardous Substances Data: 105154-79-8(Hazardous Substances Data)

Upstream product

• 100333-94-6 RhH₃(triphos) 
• 74-85-1 ethene 
• 127332-18-7 RhCl(⁽¹³⁾C₂H₄){CH₃C(CH₂P(C₆H₅)2)3} 
• 15523-24-7 sodium tetraethylborate 
• 105139-41-1 (triphos)RhCl(C₂H₄) 
• 925-90-6 ethylmagnesium bromide 

Downstream Products

• 100333-94-6 RhH₃(triphos) 

Relevant articles and documents

Rhodium Complexes with the Tripodal Triphosphine MeC(CH2PPh2)3 as Highly Reactive Systems for Hydrogenation and Hydroformylation of Alkenes

The (triphos)Rh fragment is able to form strong bonds with several reactive species (hydride, alkyl, carbon monoxide, alkenes), some reactions of which are highly specific; preliminary results on the hydrogenation and hydroformylation of hex-1-ene using (triphos)RhH(C2H4) as catalyst precursor are discussed.

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.

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).