24554-47-0

Basic information

• Product Name: Mo(CO)4(P(CH₃)2(C₆H₅))2
• Synonyms: Mo(CO)4(P(CH₃)2(C₆H₅))2
• CAS NO: 24554-47-0
• Molecular Weight: 484.28
• Mol File: 24554-47-0.mol

Chemical Properties

• CAS DataBase Reference: Mo(CO)4(P(CH₃)2(C₆H₅))2(CAS DataBase Reference)
• NIST Chemistry Reference: Mo(CO)4(P(CH₃)2(C₆H₅))2(24554-47-0)
• EPA Substance Registry System: Mo(CO)4(P(CH₃)2(C₆H₅))2(24554-47-0)

Safety Data

• Hazardous Substances Data: 24554-47-0(Hazardous Substances Data)

Upstream product

• 12146-37-1 (bicyclo[2.2.1]hepta-2,5-diene)tetracarbonylmolybdenum⁽⁰⁾ 
• 672-66-2 Dimethyl(phenyl)phosphine 
• 13939-06-5 molybdenum hexacarbonyl 
• 16940-66-2 sodium tetrahydroborate 
• 22547-54-2 2Mo⁽²⁺⁾*4I^(1-)*8CO=Mo₂I₄(CO)8 

Downstream Products

• 24554-78-7 Mo(CO)5(P(C₆H₅)(CH₃)2) 

Relevant articles and documents

Complexes of molybdenum(III) and -(IV) with chloride and tertiary phosphine ligands; an omniumgatherium of new and old results

The preparations and structures of four new mixed chloro-tertiary phosphine complexes 1, 3-5 of molybdenum(III) are reported, as well as the structure of two previously known Mo(III) complexes 2, 6 and the structure of an [MoCl6](2-) compound 7. These res

Heat of reaction of (norbornadiene)molybdenum tetracarbonyl with monodentate and bidentate ligands. Solution thermochemical study of ligand substitution in the complexes cis-L2Mo(CO)4

The enthalpy of reaction of (NBD)Mo(CO)4 (NBD = norbornadiene) with a number of monodentate and bidentate ligands forming cis-L2Mo(CO)4 has been measured at 30°C in THF solution. The heats of reaction span a range of 33 kcal/mol. The order of stability for monodentate ligands is PCl3 6H5)3 6H5)3 3 6H5)3 6H5)2(CH3) 6H5)(CH3)2 3)3 3 6H11)NC 3 3. The series of chelating bidentate phosphines R2P-(CH2)nPR2 (n = 1-4, R = C6H5; n = 1, 2, R = CH3) and several related ligands were investigated. The chelating ring systems in the metallacycles show strain energies of about 8 kcal/mol for four-membered rings. The mixed ligand (C6H5)2PCH2CH2-As(C 6H5)2 shows a heat of binding midway between the heats of binding of (C6H5)2PCH2CH2P(C 6H5)2 and (C6H5)2AsCH2C-H2As(C 6H5)2, implying group additivity in this system. The complex (phen)Mo(CO)4 is some 5 kcal/mol more stable than (bpy)Mo(CO)4, presumably due to conformational effects in the free ligand. The ligand 1,5-cyclooctadiene forms a complex 2 kcal/mol less stable than that of norbornadiene. The influences of steric and electronic factors in determining the Mo-L bond strength are discussed.

Thermal reaction of Mo2I4(CO)8 with PMe2Ph, PEt2Ph, and pyridine. Formation of metal-metal quadruple bonds vs. disproportionation. X-ray crystal structures of MoI3(PMe2Ph)2(POMe2Ph) and [PHEt2Ph][MoI4(PEt2Ph)2]

The thermal reactions of Mo2I4(CO)8 with PMe2Ph, PEt2Ph, and pyridine (py) have been studied. The reaction with pyridine leads to disproportionation with formation of Mo(CO)3(py)3 and MoI3(py)3. The reactions with the two phosphines in toluene as solvent lead to disproportionation as well as to the formation of the Mo2I4L4 (L = PMe2Ph, PEt2Ph) dimers with metal-metal quadruple bonds. The use of THF as solvent in the PEt2Ph reaction suppresses the formation of the molybdenum(II) dimer in favor of disproportionation. Compounds Mo2I4(PMe2Ph)4 (1) and MoI3(PMe2Ph)2(POMe2Ph) (2) have been isolated from the PMe2Ph reaction in toluene, while the compound [PHEt2Ph][MoI4(PEt2Ph)2] (3) has been obtained from the PEt2Ph reaction in THF. Compounds 2 and 3 have been structually characterized by X-ray diffraction methods. Compound 2: space group Pmn21, a = 13.801 (3) ?, b = 12.303 (3) ?, c = 9.298 (1) ?, V = 1578.7 (8) ?3, Z = 2, R = 0.0516 (Rw = 0.0622) for 1038 data with Fo2 > 3σ(Fo2). Compound 3: space group P21/c, a = 20.144 (6) ?, b = 10.368 (2) ?, c = 19.822 (3) ?, β = 109.37°, V = 3904 (3) ?3, Z = 4, R = 0.0371 (Rw = 0.0540) for 3902 data with Fo2 > 3σ(Fo2). A possible mechanism that interrelates the two different pathways is discussed.

Transition-metal Chemical Shifts in Complexes of Molybdenum(0) and Tungsten(0)

Molybdenum-95 and tungsten-183 n.m.r. spectra have been measured by direct observation and by multiple-resonance methods respectively for 65 related derivatives of and with (mainly) phosphorus ligands.The chemical shifts of the two nuclei are remarkably parallel, those for (183)W being ca. 1.7 times more sensitive to changes in chemical environment than those for (95)Mo.The chemical shifts are temperature-dependent, and trends in them can be largely accounted for by variations in the mean electronic excitation energy.The metal-phosphorus spin-coupling constants are very predictable.Molybdenum-95 linewidths in many cases are quite small, and can be broadly explained by the use of a point-charge model.