33846-96-7

Basic information

• Product Name: (pentacarbonyl)(diethylamino)tungsten
• Synonyms: (pentacarbonyl)(diethylamino)tungsten
• CAS NO: 33846-96-7
• Molecular Weight: 397.04
• Mol File: 33846-96-7.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: (pentacarbonyl)(diethylamino)tungsten(CAS DataBase Reference)
• NIST Chemistry Reference: (pentacarbonyl)(diethylamino)tungsten(33846-96-7)
• EPA Substance Registry System: (pentacarbonyl)(diethylamino)tungsten(33846-96-7)

Safety Data

• Hazardous Substances Data: 33846-96-7(Hazardous Substances Data)

Usage

General Description

The chemical compound "(pentacarbonyl)(diethylamino)tungsten" is a tungsten complex that contains a tungsten atom coordinated with five carbonyl (CO) ligands and a diethylamino ligand. It is commonly used as a catalyst in organic synthesis and can facilitate various reactions such as hydrogenation, isomerization, and carbonylation. Due to its unique electronic and steric properties, this compound has shown promising applications in the development of new materials and pharmaceuticals. Additionally, it has been studied for its potential use in industrial processes such as fuel production and environmental remediation. Overall, "(pentacarbonyl)(diethylamino)tungsten" is a versatile and important compound with a wide range of potential applications in chemistry and industry.

Upstream product

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

Relevant articles and documents

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