491837-90-2

Upstream product

• 67-51-6 3,5-dimethyl-1H-pyrazole 
• 38460-08-1 1‐(2‐chloroethyl)‐3,5‐dimethyl‐1H‐pyrazole 
• 829-85-6 diphenylphosphane 

Downstream Products

• 1313494-90-4 [Cu((3,5-dimethyl-1H-pyrazol-1-yl)ethyldiphenylphosphine)2]PF₆ 
• 1313494-94-8 Au₂Cl₂((3,5-dimethyl-1H-pyrazol-1-yl)ethyldiphenylphosphine)2 
• 935764-80-0 [Rh(CO)Cl(3,5-dimethyl-1-(2-(diphenylphosphino)ethyl)pyrazole)] 
• 935764-82-2 [Ir(1,5-cyclooctadiene)(3,5-dimethyl-1-(2-(diphenylphosphino)ethyl)pyrazole)]BPh₄ 
• 541534-45-6 trans,cis,cis-[(κ2P,N-3,5-dimethyl(1-((2-diphenylphosphino)ethyl)pyrazole)2RuCl2] 
• 491837-99-1 [Rh(1-[2-(diphenylphosphanyl)ethyl]-3,5-dimethylpyrazole)2][BF₄] 
• 491837-93-5 [Rh(1,5-cyclooctadiene)(1-[2-(diphenylphosphanyl)ethyl]-3,5-dimethylpyrazole)][BF₄] 

Relevant academic research and scientific papers

Synthesis of a new potentially hemilabile ligand: 1-[2-(diphenylphosphanyl)ethyl]-3,5-dimethylpyrazole, and comparison of its bonding properties with the related 1-[2-(ethylamino)ethyl]-3,5-dimethylpyrazole ligand toward RhI

The new ligand 1-[2-(diphenylphosphanyl)ethyl]-3,5-dimethylpyrazole (2) has been prepared by the reaction of 1-(chloroethyl)-3,5-dimethylpyrazole and PPh2Li. The bidentate N,N ligand 1-[2-(ethylamino)ethyl]-3,5-dimethylpyrazole (1) and 2 react with [Rh(COD)(THF)2][BF4] to give [Rh-(COD)(1)][BF4] (3) and [Rh(COD)(2)][BF4] (4), respectively. Substitution of 1,5-cyclooctadiene with carbon monoxide in the latter complexes generates [Rh(CO)2(1)][BF4] (5) and [Rh(CO)2(2)][BF4] (6), respectively. Treatment of Rh(COD)(THF)2][BF4] with two equivalent amounts of 2 results in the complex [Rhf2)2][BF4] (7), which converts to [Rh(CO)(2)2][BF4] (8) on reaction with carbon monoxide. Ligand 2 in complex 8 exhibits a hemilabile character. The single-crystal X-ray structures of 3, 4, and 7 are reported. Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002.