36608-07-8

Basic information

• Product Name: dimolybdenum(Mo-Mo) - trifluoroacetic acid (1:4)
• CAS NO: 36608-07-8
• Molecular Formula: C₈F₁₂Mo₂O₈
• Molecular Weight: 647.9734
• Mol File: 36608-07-8.mol

Chemical Properties

• Boiling Point: 72.2°C at 760 mmHg
• Vapor Pressure: 96.2mmHg at 25°C
• CAS DataBase Reference: dimolybdenum(Mo-Mo) - trifluoroacetic acid (1:4)(CAS DataBase Reference)
• NIST Chemistry Reference: dimolybdenum(Mo-Mo) - trifluoroacetic acid (1:4)(36608-07-8)
• EPA Substance Registry System: dimolybdenum(Mo-Mo) - trifluoroacetic acid (1:4)(36608-07-8)

Safety Data

• Hazardous Substances Data: 36608-07-8(Hazardous Substances Data)

Upstream product

• 72509-73-0 Mo₂(CF₃CO₂)4(P(CH₂CH₃)3)2 
• 72509-74-1 Mo₂(CF₃CO₂)4(P(CH₃)3)2 
• 98064-56-3 Mo₂(CF₃CO₂)4(P(C₄H₉)3)2 

Downstream Products

• 148508-92-3 meso-Mo₂Cl₄(tetraphos-1) 
• 76036-78-7 2Mo⁽²⁺⁾*4CF₃CO₂^(1-)*2(CH₂CH₃)2O=Mo₂(CF₃CO₂)4((CH₂CH₃)2O)2 
• 76036-79-8 Mo₂(CF₃CO₂)4(P(CH₃)(C₆H₅)2)2 
• 464191-10-4 trans-[Mo₂(trifluoroacetate)2(N,N'-di(2-methoxyphenyl)formamidinate)2] 
• 182114-81-4 bis[dibromo(μ-bis(diphenylphosphino)amine)molybdenum(II)] 
• 474082-05-8 trans-[Mo2(μ-O2CCF3)2(P(C6H5)(C5H4N)2)2(O2CCF3)2] 
• 474081-99-7 [Mo2(μ-O2CCF3)3(P(C6H5)(C5H4N)2)(O2CCF3)] 
• 474082-03-6 trans-[Mo2(μ-O2CCF3)2(P(C6H5)2(C5H4N))2(O2CCF3)2] 
• 474081-96-4 [Mo2(μ-O2CCF3)3(P(C6H5)2(C5H4N))(O2CCF3)] 
• 347840-35-1 Mo₂(2,6-bis(phenylamino)pyridine)4*toluene 
• 72453-48-6 bis(tricyclohexylphosphine)tetrakis(trifluoroacetato)dimolybdenum(II) 
• 72453-45-3 bis(methyldiphenylphosphine)tetrakis(trifluoroacetato)dimolybdenum(II) 
• 72509-70-7 bis(dimethylphenylphosphine)tetrakis(trifluoroacetato)dimolybdenum(II) 
• 64490-77-3 α-Mo2Cl4(dppe)2 

Relevant articles and documents

Tertiary alkylphosphine adducts of Mo2(O2CCF3)4 (Mo - 4Mo)

Mo2(O2CCF3)4 reacts with 2 equiv of PR3 (R = Me, Et, n-Bu) in toluene to give adducts of stoichiometry Mo2(O2CCF3)4·2PR3. These complexes have been characterized by solid-state infrared spectroscopy and variable-temperature 19F and 31P{1H} NMR. A single isomer, with equatorially bound phosphines, is observed in solution at temperatures below ca. -40°C in each case. Previous work on the PMe3 and PEt3 adducts suggested that there were two or more equatorial isomers present in solution at low temperature. The discrepancy between the two studies can be traced to the purity of Mo2(O2CCF3)4, which is usually prepared by metathesis of Mo2(O2CCH3)4 in refluxing trifluoroacetic acid. In our hands, this procedure gives a product contaminated with Mo2(O2C-CF3)3(O2CCH 3). X-ray structural studies on Mo2(O2CCF3)4·2PBu3 show that this complex has a C2h core, which is presumably maintained in solution. The Mo-Mo and Mo-P bond lengths are 2.105 (1) and 2.542 (2) A?, respectively. The differences in solution behavior between homologous M2(O2CCF3)4·2PR3 complexes (M = Mo, W) are discussed and correlated with M-P bond strengths. Phosphine-exchange reactions are used to generate the mixed-phosphine equatorial adducts M2(O2CCF3)4·PEt 3·PBu3 (M = Mo, W) in solution. The electronic absorption spectra of M2(O2CCF3)4·2PMe3 (M = Mo, W) are reported and the δ → δ*, 1Ag → 1Bu transitions are assigned and discussed. Crystal data (at -125°C) for Mo2(O2CCF3)4·2PBu3 are as follows: monoclinic space group I2/a, a = 19.390 (10) A?, b = 10.414 (4) A?, c = 21.790 (11) A?, β = 94.64 (4)°, V = 4385.58 A?3, Z = 4, dcalcd = 1.586 g cm-3.