33846-96-7

Usage

Uses

Used in Organic Synthesis:
(pentacarbonyl)(diethylamino)tungsten is used as a catalyst for various organic synthesis reactions, such as hydrogenation, isomerization, and carbonylation. Its unique properties allow it to facilitate these reactions efficiently, making it a valuable tool in the synthesis of complex organic molecules.
Used in Material Development:
In the field of material development, (pentacarbonyl)(diethylamino)tungsten is used as a precursor for creating new materials with specific properties. Its unique electronic and steric characteristics contribute to the development of advanced materials with potential applications in various industries.
Used in Pharmaceutical Research:
(pentacarbonyl)(diethylamino)tungsten is also used as a research compound in the pharmaceutical industry. Its unique properties make it a promising candidate for the development of new drugs and pharmaceuticals, potentially leading to innovative treatments for various medical conditions.
Used in Industrial Processes:
This tungsten complex is used in industrial processes such as fuel production and environmental remediation. Its catalytic properties and ability to facilitate various reactions make it a valuable asset in improving the efficiency and sustainability of these processes.
Used in Chemical Research:
(pentacarbonyl)(diethylamino)tungsten is employed as a research compound in the field of chemistry. Its unique properties and potential applications make it an interesting subject for further study, with the aim of discovering new reactions, materials, and pharmaceuticals.

Upstream product

• 109-89-7 diethylamine 
• 140834-40-8 pentacarbonyl{4-cycloheptatrienyl-1-(diethylamino)-3-ethoxy-2-methyl-2E-butenylidene}tungsten 

Relevant academic research and scientific papers

Organic Syntheses via Transition Metal Complexes, 60. - Novel Type of Benzoannelation with Carbene Complexes and Alkynes. - 2-Oxybenzoannelation of Cycloheptatriene via (Cycloheptatrienylmethyl)carbene Complexes of Chromium and Tungsten

We report on a three-step procedure for the regiospecific 2-oxybenzoannelation to cycloheptatriene by means of Fischer carbene complexes and alkynes.The first step involves the formation of (cycloheptatrienylmethyl)carbene complexes LnM=C(OEt)-CH2-c-C7H7 nM = Cr(CO)5 (a), W(CO)5 (b)> from the corresponding methylcarbene complexes and a tropylium salt. 1 reacts with the alkyne Et2N-CC-Me (2) to give the (E)- and (Z)-1-amino(1-alkenyl)carbene comlexes LnM=C(NEt2)-C(Me)=C(OEt)-CH2-c-C7J7 (3 and 4 resp.).Thermolysis of 3b n = W(CO)5, 100 deg C, 5 h> finally leads to elimination of W(CO)5(Et2NH) (6b) and the regiospecific formation of ethoxybenzocycloheptatrienes 5, 7, and 8 in 92percent total yield.The reaction is kinetically controlled and yields an isomeric ratio of 5:7:8 = 60:12:20percent with the thermodynamically less stable isomer 5 predominating. Key Words: Carbene complexes, cycloaddition reactions of / Carbene complexes, reactions with alkynes / Benzocycloheptatrienes / 2-Oxybenzannelation / (Cycloheptatrienylmethyl)carbene complexes of chromium and tungsten

Siliciumhaltige Carben-Komplexe XIII. Darstellung und Eigenschaften der 16-Elektronen Carben-Komplexe (CO)4MC(NR2)SiR'3 (M = Cr, Mo, W)

Dialkylaminocarbene complexes (CO)5MC(NR2)SiR'3 (1-3) (M = Cr, Mo, W; SiR'3 = SiPh3, SiPh2Me, SiPhMe2; NR2 = NMe2, NMeEt, NC4H8, NC5H10) are obtained by reaction of (CO)5MC(OEt)SiR'3 with HNR2.If the sterically more demanding amines HNEt2, HNBunMe or HN(CH2Ph)Me are used, monoalkylamino-substituted carbene complexes (CO)5MC(NHR)SIR'3 are formed instead, owing to cleavage of one of the organic substituents at nitrogen.However, diethyl-amino-substituted carbene complexes can be synthetized by reaction of the anionic complexes Li with Et3O+ and show no unusual chemical behaviour.The anionic complexes are prepared by deprotonation of (CO)5MC(NHEt)SiR'3.On heating the pentacarbonyl complexes 1-3 to 100-150 deg C, in the case of some of the chromium and molybdenum complexes already during their synthesis, a cis-CO ligand is lost to give the stable 16-electron carbene complexes (CO)4MC(NR2)SiR'3 (8-10).An X-ray structure analysis of (CO)4WC(NC5H10)SiPh3 (8d) reveals that the empty coordination site that results is screened by a phenyl substituent and that relaxation of the steric strain induced by the bulky carbene ligand, seems to be the driving force for the formation of the 16-electron species.In solution the 16-electron complexes 8-10 are fluxional.In a CO atmosphere the complexes 8-10 are retransformed quantitatively into the pentacarbonyl complexes 1-3.Reaction of (CO)4WC(NMe2)SiPh3 (8a) with methyl isonitrile or phosphines exclusively yields cis-substituted (CO)4LWC(NMe2)SiPh3 (L = MeNC, PR3).