97704-42-2

Basic information

• Product Name: W(CO)4(P(CH₃)2C₆H₅)(P(C₆H₅)2(C(CH₃)3))
• CAS NO: 97704-42-2
• Molecular Weight: 676.341
• Mol File: 97704-42-2.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: W(CO)4(P(CH₃)2C₆H₅)(P(C₆H₅)2(C(CH₃)3))(CAS DataBase Reference)
• NIST Chemistry Reference: W(CO)4(P(CH₃)2C₆H₅)(P(C₆H₅)2(C(CH₃)3))(97704-42-2)
• EPA Substance Registry System: W(CO)4(P(CH₃)2C₆H₅)(P(C₆H₅)2(C(CH₃)3))(97704-42-2)

Safety Data

• Hazardous Substances Data: 97704-42-2(Hazardous Substances Data)

Upstream product

• 6002-34-2 tert-butyldiphenylphosphine 

Relevant articles and documents

Relative phosphorus ligand sizes from cis:trans distributions of W(CO)4(L)(L′) products obtained from the reaction of W(CO)4(L) (py) with L′ (L and L′ = phosphines), reaction kinetics, and syntheses of starting materials

The relative sizes of 12 phosphines (L′ = PMe3, PPhMe2, PEt3, P(n-Bu)3, PPh2Me, PPh2Et, PPh3, P(p-tol)3, PPh2(i-Pr), PPh2(t-Bu), PBz3, or PCy3) have been studied by determining cis:trans ratios of W(CO)4(L)(L′) products obtained from reactions of W(CO)4(L)(py) complexes with L′ (L = PPhMe2, PPh2Et, or P(p-tol)3). In general, a decrease in the cis:trans ratio was observed as the Tolman cone angle of L′ increased. Exceptions occurred with PEt3 and P(H-Bu)3, for which cone angles of 140-145°, rather than Tolman's value of 132°, would be consistent with the other ratio data. Kinetic studies of these reactions indicate that dissociative loss of pyridine is rate limiting. Also reported are the synthesis of W(CO)4(L)(py) from W(CO)4(py)2 and L and 31P NMR data for 21 new W(CO)4(L)(L′) complexes.