83136-76-9 Usage
Uses
Used in Organic Synthesis:
BIS(ETHYLCYCLOPENTADIENYL)TUNGSTEN DICHLORIDE is used as a catalyst for various organic reactions due to its ability to mediate a range of organic transformations. It plays a crucial role in the synthesis of new organic compounds and materials.
Used in Olefin Metathesis:
In the field of organometallic chemistry, BIS(ETHYLCYCLOPENTADIENYL)TUNGSTEN DICHLORIDE is used as a catalyst for olefin metathesis, a type of reaction that involves the redistribution of carbon-carbon double bonds (olefins) to form new olefins.
Used in Alkyne Coupling:
BIS(ETHYLCYCLOPENTADIENYL)TUNGSTEN DICHLORIDE is also utilized as a catalyst in alkyne coupling reactions, which are essential for the formation of new carbon-carbon triple bonds, further expanding the scope of organic synthesis.
Used in Carbon-Carbon Bond Forming Reactions:
BIS(ETHYLCYCLOPENTADIENYL)TUNGSTEN DICHLORIDE is employed as a catalyst in various carbon-carbon bond forming reactions, contributing to the development of complex organic molecules and advanced materials. Its high catalytic activity and reactivity make it a valuable asset in these processes.
Check Digit Verification of cas no
The CAS Registry Mumber 83136-76-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,1,3 and 6 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 83136-76:
(7*8)+(6*3)+(5*1)+(4*3)+(3*6)+(2*7)+(1*6)=129
129 % 10 = 9
So 83136-76-9 is a valid CAS Registry Number.
83136-76-9Relevant academic research and scientific papers
Formation and cleavage of carbon-carbon and tungsten-carbon bonds involving bis(η-cyclopentadienyl)tungsten compounds
Chong, Kenneth S.,Green, Malcolm L. H.
, p. 1586 - 1590 (2008/10/08)
Cocondensation of spiro[2,4]hepta-4,6-diene with tungsten atoms gives [W(η-C5H4CH2CH2)2], 1. One-electron oxidation of 1 with AgPF6 gives [W(η-C5H4CH2CH2) 2]PF6 which readily reduces to 1. Treatment of I with [Pha3C]PF6 or of [W(η-C5H4CH2CH2) 2]PF6 with Ph3C gives [W(η-C5H4CH2-trans-η-CH=CHCH 2-η-C5H4)H]PF6 via a carbon-carbon bond formation reaction. [W(η-C5H4CH2-trans-η-CH=CHCH 2-η-C5H4)H]PF6 is readily deprotonated with aqueous base forming [W(η-C5H4CH2-trans-η-CH=CHCH 2-η-C5H4)H]PF6. Treatment of [W(j?-C5H4CH2CH2)2] with PhICl2 cleaves both tungsten-carbon bonds forming the tetrachloro derivative [W(η-C5H4CH2Cl)2Cl2]. This is readily reduced back to [W(η-C5H4CH2CH2)2] by sodium amalgam. 1 reacts with 1 equiv of benzoic acid forming [W(η-C5H4CH2CH2)(η-EtC 5H4)OCOPh] which upon treatment with trimethyliodosilane gives [W(η-C5H4CH2CH2)(η-EtC 5H4)I]. This compound reacts with PMe3 in acetone giving first [W(η-C3H4CH2CH-(PMe 3)(η-EtC5H4)H]PF6 and then [W(η-C5H4CH2CH2)(η-EtC 5H4)PMe3]PF6. A mechanism involving a 1,2-hydrogen shift equilibrium is proposed to account for this sequence of reactions.
