136983-78-3

Basic information

• Product Name: trichlorotris(diethylphenylphosphine)molybdenum(III)
• CAS NO: 136983-78-3
• Molecular Weight: 700.908
• Mol File: 136983-78-3.mol

Chemical Properties

• CAS DataBase Reference: trichlorotris(diethylphenylphosphine)molybdenum(III)(CAS DataBase Reference)
• NIST Chemistry Reference: trichlorotris(diethylphenylphosphine)molybdenum(III)(136983-78-3)
• EPA Substance Registry System: trichlorotris(diethylphenylphosphine)molybdenum(III)(136983-78-3)

Safety Data

• Hazardous Substances Data: 136983-78-3(Hazardous Substances Data)

Upstream product

• 31355-55-2 trichlorotris(tetrahydrofuran)molybdenum(III) 
• 1605-53-4 diethyl-phenyl-phosphine 

Downstream Products

• 59752-91-9 Mo₂Cl₄(diethylphenylphosphine)4 

Relevant articles and documents

1H NMR investigation of the tetrahydrofuran replacement by phosphine ligands on MoCl3(THF)3. A trans effect

The reactions of mer-MoCl3(THF)3 with the phosphine ligands (L) PPhxMe3-x (x = 0, 1, 2, 3), PPhxEt3-x (x = 0, 1, 2), and PR3 (R = n-Pr, n-Bu) have been investigated in CDCl3 or CD2Cl2 by paramagnetic 1H NMR spectroscopy. In all cases, a trans effect is shown by the data: the THF ligand trans to chloride is replaced much more rapidly than the two THF ligands trans to each other, to produce the observed mer-,trans-MoCl3(THF)2L intermediates. The reaction with PMe3, PEt3, PMe2Ph, PMePh2, and PEt2Ph proceeds to the tris(phosphine) mononuclear derivatives mer-MoCl3L3. For the bulkier PEtPh2 and PPh3 systems, the mer,trans-MoCl3(THF)2L intermediates completely lose THF but do not yield the corresponding tris(phosphine) derivatives; instead, they yield dinuclear products. The most nucleophilic among the above phosphines and P(n-Pr)3 and P(n-Bu)3 react with the chlorinated solvents to displace chloride anions, which generate the trans-[MoCl4(PR3)2]- anions. The latter ions have also been obtained independently from [MoCl4(THF)2]- and the appropriate phosphine.