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The trans,trans,cis-isomer is obtained by cyclotrimerization of butadiene catalyzed by a mixture of titanium tetrachloride and an organoaluminium co-catalyst. Production capacity in 1995 was 8000 tons. [2] Route to cis,trans,trans-CDT from butadiene
A Lindlar catalyst is a heterogeneous catalyst consisting of palladium deposited on calcium carbonate or barium sulfate then poisoned with various forms of lead or sulfur. It is used for the hydrogenation of alkynes to alkenes (i.e. without further reduction into alkanes). It is named after its inventor Herbert Lindlar, who discovered it in 1952.
Hormona Lisa made made her first television appearance as an audience member for reality series Bring Back My Girls (2023), while submitting a question to British drag performer Lady Camden. [6] Hormona Lisa attended American drag performer RuPaul's book tour for his memoir The House of Hidden Meanings (2024) on March 10.
Palladium on carbon is a common catalyst for hydrogenolysis. Such reactions are helpful in deprotection strategies. Particularly common substrates for hydrogenolysis are benzyl ethers: [5] Other labile substituents are also susceptible to cleavage by this reagent. [6]
The descriptors cis (Latin, on this side of) [2] and trans (Latin, over, beyond) [3] are used in various contexts for the description of chemical configurations: [4] [5] In organic structural chemistry , the configuration of a double bond can be described with cis and trans , in case it has a simple substitution pattern with only two residues.
Noa-Lynn van Leuven (born 27 September 1996) is a Dutch darts player who competes in Professional Darts Corporation (PDC) events. She was the first openly transgender person to compete in a televised darts tournament and the first to play at the PDC World Darts Championship, making her debut at the 2025 event. van Leuven won a title on the PDC Challenge Tour and four titles on the Women's ...
An upcoming high school girls' basketball playoff game will feature an openly transgender athlete playing for San Francisco Waldorf against Cornerstone Christian on Saturday. The same trans ...
A copper chromite catalyst is usually used industrially. [1] The cis/trans ratio of the CHDM is affected by the catalyst. [2] Byproduct of this process are 4-methylcyclohexanemethanol (CH 3 C 6 H 10 CH 2 OH) and the monoester methyl 4-methyl-4-cyclohexanecarboxylate (CH 3 C 6 H 10 CO 2 CH 3, CAS registry number 51181-40-9). [3]