947261-37-2

Basic information

• Product Name: (diphenyl bis(3,5-dimethylpyrazol-1-yl)methylphosphonite)W(CO)3
• CAS NO: 947261-37-2
• Molecular Weight: 688.332
• Mol File: 947261-37-2.mol

Chemical Properties

• CAS DataBase Reference: (diphenyl bis(3,5-dimethylpyrazol-1-yl)methylphosphonite)W(CO)3(CAS DataBase Reference)
• NIST Chemistry Reference: (diphenyl bis(3,5-dimethylpyrazol-1-yl)methylphosphonite)W(CO)3(947261-37-2)
• EPA Substance Registry System: (diphenyl bis(3,5-dimethylpyrazol-1-yl)methylphosphonite)W(CO)3(947261-37-2)

Safety Data

• Hazardous Substances Data: 947261-37-2(Hazardous Substances Data)

Upstream product

• 101-02-0 triphenyl phosphite 
• 586956-34-5 [CH(3,5-Me2Pz)2-κ3-[N,C,N]]W(carbonyl)3(triphenylstannyl) 
• 586956-39-0 [CH(3,5-Me2Pz)2-κ3-[N,C,N]]W(carbonyl)3(tri(p-tolyl)stannyl) 

Relevant articles and documents

Reactivity of the four-membered heterometallacycles CH(3,5-Me 2Pz)2(CO)3WSnAr3 (Pz = Pyrazol-1-yl) with P(OR)3: Unexpected P-O/C exchange reactions in phosphite

Reactions of CH(3,5-Me2Pz)2(CO)3WSnAr 3 (Pz = pyrazol-1-yl; Ar = phenyl, p-tolyl) with P(OR)3 (R = methyl, isopropyl) under solvent-free conditions give the decarbonylated complexes CH(3,5-Me2Pz)2-(CO)2(P(OR) 3)WSnAr3. However, treatment of CH(3,5-Me2 2Pz)2(CO)3WSnAr3 with P(OMe) 3 at elevated temperature results in unexpected P-O/C exchange reactions with the cleavage of the W-C bond to give the novel reductive elimination product (MeO)2PCH(3,5-Me2Pz) 2W(CO)3. Furthermore, even at low temperature, the reaction of CH(3,5-Me2Pz)2(CO)3WSnAr 3 with P(OAr)3 only yields the similar reductive elimination products (ArO)2PCH(3,5-Me2Pz) 2W(CO)2. In these novel tungsten(0) complexes, the newly formed diaryl or dialkyl bis(3,5-dimethylpyrazol-1-yl)methylphosphonite acts as a neutral tridentate κ3-[N,N,P] chelating ligand.