83781-30-0

Basic information

• Product Name: PENTAAMMINE(TRIFLUOROMETHANESULFONATO)OSMIUM(III) TRIFLUOROMETHANESULFONATE
• Synonyms: PENTAAMMINE(TRIFLUOROMETHANESULFONATO)OSMIUM(III) TRIFLUOROMETHANESULFONATE;pentaammine(trifluoromethanesulfonato)-osmium(iii;PentaammineOsmium(III)Trifluoromethanesulfonate;pentaammine(trifluoromethanesulfonato)osmium(iii) triflate;Pentaammine(triflato)osmium(III) triflate
• CAS NO: 83781-30-0
• Molecular Formula: 2CF₃O₃S*CH₁₅F₃N₅O₃OsS
• Molecular Weight: 722.59
• Mol File: 83781-30-0.mol
• Article Data: 2

Chemical Properties

• Melting Point: ~276 °C(lit.)
• Appearance: /
• CAS DataBase Reference: PENTAAMMINE(TRIFLUOROMETHANESULFONATO)OSMIUM(III) TRIFLUOROMETHANESULFONATE(CAS DataBase Reference)
• NIST Chemistry Reference: PENTAAMMINE(TRIFLUOROMETHANESULFONATO)OSMIUM(III) TRIFLUOROMETHANESULFONATE(83781-30-0)
• EPA Substance Registry System: PENTAAMMINE(TRIFLUOROMETHANESULFONATO)OSMIUM(III) TRIFLUOROMETHANESULFONATE(83781-30-0)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36
• WGK Germany: 3
• Hazardous Substances Data: 83781-30-0(Hazardous Substances Data)

Usage

Uses

Useful for the dearomatization of anilines, and the stereoselective synthesis of cyclohexanediones by osmium(II)-promoted Michael additions to phenols. Precursor to Fischer carbyne complexes.

InChI:InChI=1/3CHF3O3S.5H3N.Os/c3*2-1(3,4)8(5,6)7;;;;;;/h3*(H,5,6,7);5*1H3;/q;;;;;;;;+3/p-3/rC3F9O9OsS3.5H3N/c4-1(5,6)23(13,14)19-22(20-24(15,16)2(7,8)9)21-25(17,18)3(10,11)12;;;;;/h;5*1H3

Upstream product

• 1493-13-6 trifluorormethanesulfonic acid 

Downstream Products

• 115244-91-2 cis-{Os(NH₃)4(4-phenylpyridine)2}Cl₃*1.5H₂O*0.5HCl 
• 115244-90-1 {Os(NH₃)5(4-phenylpyridine)}Cl₃*2H₂O 
• 115289-85-5 {Os(NH3)5(3,4-η2-PhPh)}(Otf)2 
• 113161-71-0 {Os(NH₃)5((C₆H₅)CO(C₆H₅))}⁽²⁺⁾*2CF₃SO₃^(1-)={Os(NH₃)5((C₆H₅)CO(C₆H₅))}{CF₃SO₃}2 
• 113161-73-2 {Os(NH₃)5((C₆H₅)CO(C₆H₅))}⁽²⁺⁾*2CF₃SO₃^(1-)={Os(NH₃)5((C₆H₅)CO(C₆H₅))}{CF₃SO₃}2 
• 97879-15-7 {(NH₃)5Os(HNC₆H₄NH₂)}⁽³⁺⁾*3CF₃SO₃^(1-)={Os(NH₃)5(HNC₆H₄NH₂)}(CF₃SO₃)3 
• 97879-13-5 {(NH₃)5Os(HNC₆H₄N(CH₃)2)}⁽³⁺⁾*3CF₃SO₃^(1-)={Os(NH₃)5(HNC₆H₄N(CH₃)2)}(CF₃SO₃)3 
• 121575-22-2 ((ND₃)5(osmium(II))(styrene))⁽²⁺⁾ 

Relevant articles and documents

Pyrazine-bridged complexes. Synthesis of and spectroscopic studies on binuclear pyrazine complexes of osmium, ruthenium, and rhodium ammines

The compound [(NH3)5Os(pz)Os(NH3)5]Cl6 is obtained (～40% yield) by the reaction of pyrazine (pz) with a small excess of [Os(NH3)5(OSO2CF3)](CF 3SO3)2 in dry acetone for 8 days and, more conveniently, by the reaction of [Os(NH3)5(pz)]2+ with [Os(NH3)5(OSO2CF3)]2+ in acetone. The best method of preparation of the binuclear ion involves the in situ generation of [Os(NH3)5(pz)]2+ by reducing a mixture of [Os(NH3)5(OSO2CF3)]2+ and pz (2:1 molar mixture) in a weakly coordinating solvent. The comproportionation constant, 1.0 × 1013 (0.1 M HCl, 22°C), obtained from electrochemical measurements (E°(6+/5+) = 0.32 V and E°(5+/4+) = -0.44 V vs NHE) is 7 orders of magnitude greater than that observed for the ruthenium analogue. The mixed-valence ion is thought to be delocalized, since the transitions arising from the effects of spin-orbit coupling on the ground electronic state, which are observed for all mononuclear and binuclear Os(III) complexes (1500-2100 nm), are absent. Instead, intense electronic transitions (ε ～(3-4) × 103 M-1 cm-1) are present in the normal-IR region (3000-3400 cm-1), which have been assigned the spin-orbit transitions of the delocalized complex. The very low intensity of the symmetric pyrazine mode in the IR spectrum (1600 cm-1) is also consistent with a symmetric delocalized description. The synthesis and properties of the binuclear complexes [(NH3)4(N2)Os(pz)Os(NH3) 5]n+ (n = 4, 5, 6), [(NH3)4(Cl)Os(pz)Os(NH3)5] m+ (m = 3, 4, 5), [(NH3)5Os(pz)Rh(NH3)5]m+ (m = 6, 5), and [(NH3)5Rh(pz)Rh(NH3)5]6+ are also described, in addition to improved syntheses of the binuclear Ru2 and RuRh complexes. The mixed-valence ion [(NH3)4(Cl)Os(pz)Os(NH3)5] 4+ has spectral properties similar to those of [(NH3)5Os(pz)Os(NH3)5]5+ and is believed to possess an electronic structure close to the delocalized description. By contrast, [(NH3)4(N2)Os(pz)Os(NH3) 5]5+ has properties typical of a valence-localized species. The [(NH3)5Rh(pz)Rh(NH3)5]5+ ion is very unstable and rapidly decomposes to form [Rh(NH3)5(pz)]3+ and an uncharacterized product. The species [(NH3)5Os(pz)Rh(NH3)5]5+ also is unstable and appears to undergo a slow intramolecular reduction of Rh(III) by Os(II).