18822-50-9

Basic information

• Product Name: Tris(triphenylsiloxy)vanadium oxide
• Synonyms: Tris(triphenylsiloxy)vanadium oxide;NSC 349960;Oxotris(triphenylsilanolato) vanadium;Triphenylsilanol vanadate
• CAS NO: 18822-50-9
• Molecular Formula: C₅₄H₄₅O₄Si₃V
• Molecular Weight: 896.1545
• Mol File: 18822-50-9.mol
• Article Data: 5

Chemical Properties

• Melting Point: 224-226°C
• Boiling Point: 388.6°Cat760mmHg
• Flash Point: 188.8°C
• Appearance: /
• Density: g/cm³
• Vapor Pressure: 9.79E-07mmHg at 25°C
• CAS DataBase Reference: Tris(triphenylsiloxy)vanadium oxide(CAS DataBase Reference)
• NIST Chemistry Reference: Tris(triphenylsiloxy)vanadium oxide(18822-50-9)
• EPA Substance Registry System: Tris(triphenylsiloxy)vanadium oxide(18822-50-9)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26
• WGK Germany: 3
• Hazardous Substances Data: 18822-50-9(Hazardous Substances Data)

Usage

Uses

Catalyst for:Dual catalyst system for Meyer-Schuster rearrangementEsterificationAddition of propargyl alcohols and imines or aldehydesPhotochemical polymerization of Me methacylate

InChI:InChI=1/3C18H16OSi.O.V/c3*19-20(16-10-4-1-5-11-16,17-12-6-2-7-13-17)18-14-8-3-9-15-18;;/h3*1-15,19H;;/r3C18H16OSi.OV/c3*19-20(16-10-4-1-5-11-16,17-12-6-2-7-13-17)18-14-8-3-9-15-18;1-2/h3*1-15,19H;

Upstream product

• 131063-11-1 Vanadium (III) chloride-(tris-tetrahydrofuran) 
• 2004-11-7 triphenylsilanol lithium salt 
• 19692-74-1 tris-pyridine trichloro vanadium (III) 
• 76-86-8 Triphenylsilyl chloride 
• 7727-18-6 vanadium(V) oxychloride 
• 10544-50-0 sulfur 
• 7632-51-1 vanadiumtetrachloride 
• 109750-14-3 tris(triphenylsiloxo)-(4-methoxyphenyl-dithiophosphonato-S,S)-vanadium(V) 
• 5588-84-1 vanadium(V) oxytriisopropoxide 
• 791-31-1 triphenylhydroxysilane 

Downstream Products

• 109750-14-3 tris(triphenylsiloxo)-(4-methoxyphenyl-dithiophosphonato-S,S)-vanadium(V) 

Relevant articles and documents

Direct Nucleophilic Substitution of Alcohols Using an Immobilized Oxovanadium Catalyst

Direct nucleophilic substitution of alcohols with thiols or carbon nucleophiles was achieved using a mesoporous silica-supported oxovanadium catalyst (VMPS4). Benzyl and allyl alcohols were compatible in this reaction under mild conditions, affording the products in high yields. The VMPS4 catalyst showed excellent chemoselectivity toward alcohols in the presence of acid-labile functional groups, which is in contrast to that observed for the commonly used Lewis acid catalysts, which exhibit poor selectivity. The VMPS4 catalyst could be recycled by simple centrifugation, and the catalytic activity was maintained over seven cycles.

Triphenylsiloxy complexes. A novel compound containing a Mo(VI)-P Bond: MoO2(OSiPh3)2(PPh3)

Triphenylsiloxy complexes have been synthesized through direct silylation of silver metalates by triphenylchlorosilane. The Mo dioxo complex MoO2(OSiPh3)2 (1) is tetrahedral and crystallizes in the Fdd2 space group with a = 19.556(7) ?, b = 34.187(4) ?, c = 9.748(5) ?, V = 6517.3(3.6) ?3, and Dcalcd = 1.38 g/cm3 for Z = 8; final residuals R = 4.4% and Rw = 4.4%. An interesting compound, MoO2(OSiPh3)2(PPh3) (2), containing the first Mo(VI)-phosphine bond was also synthesized in this study and characterized by single-crystal X-ray diffraction. X-ray crystallographic data for compound 2: a = 18.498(4) ?, b = 10.818(3) ?, c = 24.844(3) ?, β = 107.08(1)°, V = 4753(2) ?3, Dcalcd =1.315 g/cm3 for Z = 4; final residuals R = 5.2% and Rw = 5.6% for 1236 (I > 3σ(I)) reflections and 194 variables. Compound 2 has a distorted trigonal bipyramidal structure with a Mo-P bond length equal to 2.759 ?. The preparation and a single-crystal X-ray structure of VO(OSiPh3)3 are also reported.