251441-52-8

Basic information

• Product Name: (bis(N-methylimidazol-2-yl)methane)dicarbonylrhodium(I) tetraphenylborate
• CAS NO: 251441-52-8
• Molecular Weight: 654.381
• Mol File: 251441-52-8.mol

Chemical Properties

• CAS DataBase Reference: (bis(N-methylimidazol-2-yl)methane)dicarbonylrhodium(I) tetraphenylborate(CAS DataBase Reference)
• NIST Chemistry Reference: (bis(N-methylimidazol-2-yl)methane)dicarbonylrhodium(I) tetraphenylborate(251441-52-8)
• EPA Substance Registry System: (bis(N-methylimidazol-2-yl)methane)dicarbonylrhodium(I) tetraphenylborate(251441-52-8)

Safety Data

• Hazardous Substances Data: 251441-52-8(Hazardous Substances Data)

Upstream product

• 124225-99-6 bis(N-methylimidazol-2-yl)methane 
• 143-66-8 sodium tetraphenyl borate 

Downstream Products

• 251441-61-9 (bis(1-methylimidazol-2-yl)methane)bis(triphenylphosphine)rhodium(I) tetraphenylborate 

Relevant articles and documents

Rhodium complexes containing bidentate imidazolyl ligands: Synthesis and structure

The preparation and characterisation of square planar cationic rhodium(I) dicarbonyl complexes {[Rh((mim)2C=O)(CO)2]+BPh4 -] (1),{[Rh((mim)2CH2)(CO)2]+BPh 4-} (2) and{[Rh((mBnzim)2CH2)(CO)2]+BPh 4-} (3) [mim=N-methylimidazol-2-yl, mBnzim=N-methylbenzimidazol-2-yl] is reported. The carbonyl ligands in 2 and 3 are readily exchanged for triphenylphosphine to form{[Rh((mim)2CH2)(PPh3)2] +BPh4-} (7) and {[Rh((mBnzim)2CH2)(PPh3)2] +BPh4-} (8). Complexes 2 and 3 were characterised by multinuclear NMR spectroscopy as well as by X-ray crystallography. Structural characterisation by X-ray analysis confirmed that complexes 2 and 3 are essentially square planar.

Hydroamination of Alkynes Catalyzed by a Cationic Rhodium(I) Complex

The cationic Rh(I) dicarbonyl complex [{Rh((mim)2CH2)(CO)2}+BPh 4-] (1), containing a bidentate bisimidazolylmethane ligand [mim = N-methylimidazol-2-yl], acts as an efficient catalyst for the intramolecular hydroamination of both terminal and nonterminal alkynes. The complex catalyzes the regioselective formation of nitrogen-containing heterocycles from aliphatic aminoalkynes and the cyclization of o-alkynylanilines to 2-substituted indoles in high yield.