14586-49-3

Usage

Uses

Used in Organic Synthesis:
Tungsten,pentacarbonyl(pyridine)-, (OC-6-22)is used as a catalyst in organic synthesis for facilitating various chemical reactions. Its catalytic properties allow for the efficient production of desired organic compounds, making it a valuable tool in the synthesis of pharmaceuticals, agrochemicals, and other organic products.
Used in Production of Tungsten-Containing Materials:
In the materials industry, Tungsten,pentacarbonyl(pyridine)-, (OC-6-22)serves as a precursor in the production of various tungsten-containing materials. These materials are known for their unique properties, such as high melting points, density, and hardness, which make them suitable for applications in electronics, aerospace, and other high-tech industries.
Used in Coordination Chemistry as a Ligand:
Tungsten,pentacarbonyl(pyridine)-, (OC-6-22)is utilized as a ligand in coordination chemistry, where it forms complexes with transition metals. These complexes exhibit interesting properties and potential applications in areas such as catalysis, materials science, and medicinal chemistry.
Used in Research and Development:
Due to its unique structure and properties, Tungsten,pentacarbonyl(pyridine)-, (OC-6-22)is also used in research and development to explore new chemical reactions, materials, and applications. Its role in advancing scientific knowledge and innovation is significant, contributing to the discovery of new compounds and processes.

Upstream product

• 108451-16-7 1,1-dideuterioallylisocyanide 
• 14780-97-3 tetraethylammonium chloropentacarbonyltungstate 
• 22694-45-7 1,2-dihydropyridine 
• 110-86-1 pyridine 
• 688-73-3 tri-n-butyl-tin hydride 
• 108417-88-5 pentacarbonyl(2-ethoxy-2-phenyl-4-pentenenitrile-N)tungsten⁽⁰⁾ 

Downstream Products

• 57972-43-7 {PPh₄}{tungsten(methylxanthato)(carbonyl)5} 
• 127440-49-7 {PPh₄}{tungsten(ethylxanthato)(carbonyl)5} 
• 14040-11-0 tungsten hexacarbonyl 
• 16743-01-4 tetracarbonylbis(pyridine)tungsten⁽⁰⁾ 
• 40813-70-5 [W(CO)3(py)3] 
• 15444-65-2 triphenylphosphine tungsten pentacarbonyl 
• 53109-57-2 tungsten pentacarbonyl 
• 102982-83-2 (CO)5W(P(C₆H₅)2F) 
• 18534-36-6 [(methyl)diphenylphosphine]pentacarbonyltungsten⁽⁰⁾ 
• 127440-51-1 {PPh₄}{tungsten(cyclohexylxanthato)(carbonyl)5} 

Relevant academic research and scientific papers

Chemoselective stepwise demetalation of unusually stable fischer biscarbene complexes by domino [4+2]/[2+2] cycloaddition of 2-isopropenyl-2-oxazoline to 1-alkynyl Fischer carbene complexes of chromium and tungsten

Domino [4+2]/[2+2] cycloaddition of 2-isopropenyl-2-oxazoline 2 to 1-alkynyl Fischer carbene complexes (CO)5M=C(OEt)C=CPh 1 (a, M = Cr; b, W) in a 1:2 molar ratio afforded unusually stable biscarbene complexes 3a and 3b containing a novel four-, five-, and six-membered tricyclic core in 99.6% and 45.2% yields, respectively. Chain-opening β-aminoalkenyl monocarbene complex 4b and β-amidoalkenyl monocarbene complex 5b of tungsten were also isolated from the cycloaddition upon treatment of the reaction mixture of 1b and 2 on silica gel. Partial and full oxidation of 3a,b with pyridine N-oxide underwent efficient chemoselective stepwise demetalation to afford the corresponding monocarbene complexes 6a,b and organic diester 7, respectively, under mild conditions. The X-ray crystallographic study revealed the presence of a four-, five-, and six-membered tricyclic core in compounds 3,6, and 7, and the methyl and oxazolindinyl groups derived from oxazoline 2 are positioned syn with respect to the azabicyclo[4.2.0]octadiene bicyclic moiety, which is oriented in the opposite direction. X-ray crystal structural data are reported for the bis- and monocarbene complexes 3a, 5b, and 6b as well as for diester 7.

Unusual formation of vinyl ether derivatives in the reaction of tributyltin hydride with fischer carbene complexes anchored on a chalcogen-stabilized iron carbonyl cluster

Treatment of Fe2(CO)6{μ-EC(Ph)=C(E′)-[C(OEt)=M(CO) 5]} (1: E, E′ = Se; M = Cr. 2: E, E′ = Se; M=W. 3: E = S; E′ = Te; M = W) with excess Bu3SnH in hexane at 0 °C produces enol ether derivatives: (CO)6Fe2{μ-EC(Ph)(H)-C(E′)=C(H)(OEt)} ((Z)-4a: E, E′ = Se. (E)-4b: E, E′ = Se. (Z)-5a: E = S; E′ = Te. (E)-5b: E = S; E′ = Te). For E, E′ = Se, using 1 equiv of Bu3SnH, the α-alkoxyallylstannane complex, (CO)6Fe2{μ-Se(Ph)C=C(Se)-C(OEt)(H)SnBu3} (6), was isolated. The molecular structure of (E)-4b was confirmed by X-ray analysis.

Four-coordinate group-14 elements in the formal oxidation state of zero - Syntheses, structures, and dynamics of [{(CO)5Cr}2Sn(L2)] and related species

The sodium salts Na2[{(CO)5M}2EX2] (M = Cr, Mo, W; E = Ge, Sn, Pb; X = Cl, I, OOCCH3) react with 2,2′-bipyridine (bipy) to form neutral compounds [{(CO)5M}2E(bipy)] (E = Sn: 1a-1c; E = Ge: 3a; E = Pb: 4). 1,10-Phenanthroline (phen) analogues of compounds 1a-1c and 3a [{(CO)5M}2E(phen)] (E = Sn: 1d-1f, E = Ge: 3b) are as well accessible. The 2,2′-bipyridine ligand in 1 may be formally replaced by two pyridine (py) ligands resulting in [{(CO)5M}2Sn(py)2] (1g: M = Cr, 1h: M = W). The bis-bidentate ligand 2,2′-bipyrimidine (bpmd) is found to coordinate just one [{(CO)5M}2Sn] entity in [{(CO)5M}2Sn(bpmd)] (2b: M = Cr, 2c: M = W). The biimidazolato (biim) ligand binds two [{(CO)5Cr}2Sn] moieties in [{(CO)5Cr}2Sn(biim)Sn{Cr(CO)5} 2]2-, 2a. It is shown by 1H-NMR that the pyrimidine entities in these compounds (2b, 2c) are able to rotate by a full 180° turnaround with respect to one another. This process must involve complete de-coordination of at least one of the two nitrogen donors in again at least one of the chelate cycles, the activation energy for this process being around 60 kJ/ mol. By 119Sn-NMR spectroscopy of almost all of the tin compounds described it is shown that equilibria between [{(CO)5M}2Sn(L2)] and [{(CO)5M}2Sn(L)] + L exist in all cases. From the temperature dependence of the δ values it is concluded that the activation barriers for this association/ dissociation process is below 10 kJ/mol. The structures of all new compounds are documented by X-ray analyses and all compounds are characterized by the usual analytical and spectroscopical techniques.

Dihydropyridines in organometallic synthesis. Formation of pyridine and dihydropyridine-stabilized alkylidene complexes of tungsten(0) and chromium(0) from Fischer carbene complexes: Structure and reactivity

1,2- and 1,4-dihydropyridines react with alkoxycarbene complexes of chromium and tungsten to give, upon an unprecedented hydride transfer, alcohol elimination, and pyridine fixation on the carbene carbon, a new class of air-stable pyridinium ylide complexes. These pyridine-protected alkylidene complexes of chromium(0) and tungsten(0) were fully characterized by X-ray crystallography. In the case of (CO)5W=C(CH3)(OEt) (5a), besides the pyridinium ylide complex (CO)5W--C(H)(CH3)(pyridine)+ (7a), the dihydropyridinium complex (CO)5W-C(H)(CH3)(2,5-dihydropyridine)+ (8a) was also isolated. The intermediate tungstate (CO)5W--C(H)(CH3)(OEt)(CH3NC5H5)+ could be easily obtained and characterized by using, as reducing agent, N-methyldihydropyridine. Whereas phenyl-substituted pyridinium complexes easily transferred the benzylidene moiety to alkenes, alkyl-substituted complexes appeared more reluctant to such a transfer: satisfactory results were observed in the case of nucleophilic olefins such as enol ethers. However, straightforward transfer of the tungsten(0) alkylidene group took place, even at room temperature, in the case of alkoxycarbene complexes tethered to alkenes, giving access, upon intramolecular cyclopropanation reactions, to polycyclic systems.

Organic Syntheses via Transition Metal Complexes, 25. - Cyanoallylation of Carbene Ligands with Allyl Isocyanides via Metal-Induced N/C-Allylic Rearrangement of Intermediate 3-Aza-1,2,5-hexatriene Complexes

Allyl isocyanides 2 react with (CO)5M=C(OEt)C6H5 (1, M = Cr, W) to give N-allylketenimine/(3-aza-1,2,5-hexatriene) complexes 3 in high yields.In absence of suitable reactants compounds 3 isomerise spontaneously and smoothly already at 0 deg C via a metal-induced N/C-migration of the allyl group to give 4-pentenenitrile complexes 5, from which the ligand can be disengaged by substitution with pyridine.The regiochemistry of the rearrangement corresponds to the type as has been proven by a labeling experiment with α,α-dideuterioallyl isocyanide.In the presence of an alcohol, the reaction of 1 with 2 leads to the formation of competition products resulting from an N/C-rearrangement or the addition of the alcohol to 3, respectively.The competition ratio strongly depends on the type of metal used.The tungsten complex 3b, e.g., at 0 deg C adds one equivalent of an alcohol to give up to 97percent yields of (allylamino)carbene complexes 8b-c, while the corresponding chromium complex 3a rearranges smoothly under these conditions to give 5a only.The addition of alcohols to 3b is reversible: on thermolysis of 8c at 70 deg C the products of thermal isomerisation of 3b together with a chelate complex 9 are obtained.