124406-57-1

Basic information

• Product Name: trans-rhenium(III)(chloro)2(4,6-dimethylpyrimidine-2-thiolate)(triphenylphosphine)2*acetone
• Synonyms: trans-rhenium(III)(chloro)2(4,6-dimethylpyrimidine-2-thiolate)(triphenylphosphine)2*acetone
• CAS NO: 124406-57-1
• Molecular Weight: 978.976
• Mol File: 124406-57-1.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: trans-rhenium(III)(chloro)2(4,6-dimethylpyrimidine-2-thiolate)(triphenylphosphine)2*acetone(CAS DataBase Reference)
• NIST Chemistry Reference: trans-rhenium(III)(chloro)2(4,6-dimethylpyrimidine-2-thiolate)(triphenylphosphine)2*acetone(124406-57-1)
• EPA Substance Registry System: trans-rhenium(III)(chloro)2(4,6-dimethylpyrimidine-2-thiolate)(triphenylphosphine)2*acetone(124406-57-1)

Safety Data

• Hazardous Substances Data: 124406-57-1(Hazardous Substances Data)

Upstream product

• 603-35-0 triphenylphosphine 
• 34248-12-9 trichlorooxobis(triphenylphosphine)rhenium(V) 
• 22325-27-5 4,6-dimethyl-pyrimidine-2-thione 
• 17442-19-2 trans-dichloro(ethoxo)oxobis(triphenylphosphine)rhenium(V) 
• 22325-27-5 4,6-dimethyl-2-meraptopyrimidine 

Downstream Products

• 123995-84-6 trans-rhenium(V)-oxo-(chloro)2(4,6-dimethylpyrimidine-2-thiolate)(triphenylphosphine) 

Relevant articles and documents

Redox interconversion of [RevO]3+?[ReIII]3+ centers in octahedral 4,6-dimethyl-pyrimidine-2-thiolate/triphenylphosphine rhenium(V) and rhenium (III) mixed complexes

Reaction of trans-[ReOX2(EtO)(PPh3)2] (X = Cl, Br, I) with 4,6-dimethylpyrimidine-2-(1H)-thione (pymSH) in 1:1 molar ratio in refluxing acetone, rapidly formed [ReOX2(pymS) (PPh3)] (X = Cl, Br, I) compounds and PPh3 in good yields. Upon increasing the refluxing time (5-6 h), the above products react in a 1:2 molar ratio producing the paramagnetic trans-[ReX2(pymS)(PPh3)2] (X = Cl, Br) species and triphenylphosphine oxide as a result of oxygen transfer from the [ReO]3+ core to the PPh3. The trans-[ReX2(pymS) (PPh3)2] (X = Cl, Br) species, in organic solvents at room temperature and in the presence of atmospheric oxygen, are easily oxidized back to [ReOX2(pymS)(PPh3)] with the concomitant formation of O = PPh3. These oxidation reactions most likely proceed through the loss of a PPh3 ligand on the reducing rhenium(III) center, which makes a coordination site available for the oxidative addition of dioxygen which produces a highly reactive rhenium-dioxygen intermediate ([ReX2(pymS)(PPh3(O2)]). The time course of the aerial oxygenation reactions at room temperature was inferred from the rate [Km = (1.30 ± 0.05) × 10-2 h-1] of disappearance of the paramagnetic trans-[ReX2(pymS)(PPh3)2] (X = Cl, Br) species, monitored by VIS-NIR and 1H NMR spectroscopy. Spectroscopic (UV-VIS-NIR. 1H and 31P NMR), magnetic and electrochemical properties of the complexes are discussed.