1551570-40-1

Basic information

• Product Name: [Os₃(CO)₈(tri(2-thienyl)phosphine)₂(μ-dppm)]
• CAS NO: 1551570-40-1
• Molecular Weight: 1739.83
• Mol File: 1551570-40-1.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: [Os₃(CO)₈(tri(2-thienyl)phosphine)₂(μ-dppm)](CAS DataBase Reference)
• NIST Chemistry Reference: [Os₃(CO)₈(tri(2-thienyl)phosphine)₂(μ-dppm)](1551570-40-1)
• EPA Substance Registry System: [Os₃(CO)₈(tri(2-thienyl)phosphine)₂(μ-dppm)](1551570-40-1)

Safety Data

• Hazardous Substances Data: 1551570-40-1(Hazardous Substances Data)

Upstream product

• 24171-89-9 tris(2-thienyl)phosphine 

Relevant articles and documents

A comparative study of the reactivity of the lightly stabilized cluster [Os3(CO)8{μ3-Ph2PCH2P(Ph)C 6H4}(μ-H)] towards tri(2-thienyl)-,tri(2-furyl)- and triphenyl-phosphine

Reactions of the lightly stabilized triosmium cluster [Os 3(CO)8{μ3-Ph2PCH 2P(Ph)C6H4}(μ-H)] with tri(2-thienyl) phosphine (PTh3) and tri(2-furyl)phosphine (PFu3) are described and compared to analogous reactions with PPh3. At room temperature, a number of products are isolated: [Os3(CO) 10(μ-dppm)] from CO addition, [Os3(CO) 8(PR3){μ3-Ph2PCH 2P(Ph)C6H4}(μ-H)] from phosphine addition, [Os3(CO)9(PR3)(mdppm)] from phosphine and CO addition and [Os3(CO)8(PR3)2(μ-dppm)] from addition of two equivalents of phosphine. The latter are shown by NMR and X-ray diffraction to exist as 1,2-isomers, whereby one phosphine is bound to the non-dppm-substituted center and the second shares an osmium atom with one end of the diphosphine. Heating 1,2-[Os3(CO)8(PTh 3)2(μ-dppm)] at 100 °C results in its clean isomerization to the 1,1-isomer in which both monodentate phosphines are located on the same osmium atom. Prolonged heating of [Os3(CO) 8(PR3)2(μ-dppm)] (R = Th, Ph) at 110 °C gives [Os3(CO)9(PR3)(mdppm)] and the new lightly stabilized clusters [Os3(CO)7(PR 3){μ3-Ph2PCH2P(Ph)C 6H4}(μ-H)], the latter being formed by loss of phosphine and CO with concurrent metalation of a phenyl ring. Heating [Os 3(CO)8(PFu3)2(μ-dppm)] at 110 °C gives [Os3(CO)9(PFu3)(μ-dppm)] together with the carbonphosphorus bond cleavage products [Os 3(CO)7(μ-PFu2)(μ3- η2-C4H2O)(μ-H)(μ-dppm)] and [Os 3(CO)7(μ-PFu2)(μ3- η2-C6H3CH3)(μ-H)(μ-dppm)]. All new compounds were characterized by analytical and spectroscopic techniques together with single crystal X-ray diffraction analysis of nine clusters. Density functional theory (DFT) calculations have been carried out on isomers of [Os3(CO)8(PR3)2(μ-dppm)] in order to understand the observed isomer ratios.