161434-84-0

Basic information

• Product Name: Mo(CO)2((C₆H₅)2PC₂H₄P(C₆H₅)2)(P(C₆H₅)3)2(SO₂)
• CAS NO: 161434-84-0
• Molecular Weight: 1139.03
• Mol File: 161434-84-0.mol

Chemical Properties

• CAS DataBase Reference: Mo(CO)2((C₆H₅)2PC₂H₄P(C₆H₅)2)(P(C₆H₅)3)2(SO₂)(CAS DataBase Reference)
• NIST Chemistry Reference: Mo(CO)2((C₆H₅)2PC₂H₄P(C₆H₅)2)(P(C₆H₅)3)2(SO₂)(161434-84-0)
• EPA Substance Registry System: Mo(CO)2((C₆H₅)2PC₂H₄P(C₆H₅)2)(P(C₆H₅)3)2(SO₂)(161434-84-0)

Safety Data

• Hazardous Substances Data: 161434-84-0(Hazardous Substances Data)

Upstream product

• 84500-97-0 cis,trans-Mo(CO)2(PPh3)2(MeCN)(η2-SO2) 
• 1663-45-2 1,2-bis-(diphenylphosphino)ethane 

Relevant articles and documents

The role of SO2 as a ligand to mediate associative substitution reactions of some 18-electron molybdenum complexes

Results of kinetic studies are reported for intramolecular PPh3 substitution reactions of Mo(CO)2(η1-L)(PPh3)2(SO2) to form Mo(CO)2(η2-L)(PPh3)(SO2) (L = dmpe=(Me)2PC2H4P(Me)2 and dppe=Ph2PC2H4PPh2) in THF as solvent.Activation parameters for the reactions are: ΔH values 12.3 kcal mol-1 for dmpe and 16.7 kcal mol-1 for dppe; and ΔS values -30.3 cal mol-1 K for dmpe and -16.4 cal mol-1 K for dppe.These results are consistent with an intramolecular associative mechanism.The facile associative pathway for the reaction is discussed in terms of the ability of SO2 to accept a pair of electrons from the metal, with a bonding transformation of η2-SO2 to η1-pyramidal SO2, so maintaining a stable 18-electron count for the complex in the transition state.Keywords: Molybdenum; Sulfur dioxide; Ligand substitution; Kinetics; Mechanism