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This section provides an overview for cyclobutadienes as well as their applications and principles. Also, please take a look at the list of 2 cyclobutadiene manufacturers and their company rankings. Here are the top-ranked cyclobutadiene companies as of December, 2024: 1.Parchem.
Table of Contents
Cyclobutadiene (C4H4) is the simplest of the cyclic hydrocarbons containing a conjugated double bond.
In 1965, R. Pettit showed that cyclobutadiene could be liberated by reacting the iron carbonyl chain of cyclobutadiene with a tetravalent cerium salt.
The number of π-electrons is stable when it consists of six (4π+2), as in benzene.
Cyclobutadiene forms a square by sigma bonding and is unstable because it consists of 4 pi-electrons, making it anti-aromatic.
Cyclobutadiene is a molecule that cannot exist because of its anti-aromatic property, consisting of four carbon atoms.
Cyclobutadiene was elucidated to be unstable based on Hückel's rule, but in the 1970s, the rectangular singlet cyclobutadiene was found to be the most stable structure.
In 2009, Prof. Sekiguchi et al. at the University of Tsukuba, in collaboration with Prof. Apeloig at the Israel Institute of Technology, succeeded for the first time in the world in optically observing cyclobutadiene in the triplet state.
*Including some distributors, etc.
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Parchem was founded in 1999 and headquartered in Rochelle, New York. Parchem is a distributor of industrial chemicals. Parchem serves nutritional, personal care, pharmaceutical, and specialty chemical industries. Parchem offerings include coatings, adhesives, elastomers, industrial products, petrochemicals, oleochemicals, plastics, rubber, nutritional supplements, cosmetics, consumer products, catalysts, metallic salts, rare earths, flavors & fragrances, industrial & institutional, textiles, other food-related chemicals, dyes, finishes, chemicals for aerospace, oil gas drilling chemicals, electronics, and pharmaceuticals.
Apollo Scientific Ltd, established in 1993 and based in Cheshire, England, is a manufacturer and supplier of aromatic, heterocyclic, and aliphatic compounds. The company's product portfolio includes fluorinated building blocks, antibiotics for cell analysis, and silica gels. These products are used in various applications, including biotechnology, analytical laboratories for performing spectroscopic analyses for quality control, research, and testing purposes, as well as academic and research institutions. The company is ISO 9001 and ISO 14001 certified, with distributors globally in the United States, South Korea, and Japan.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Parchem |
100.0%
|
Derivation Method
The ranking is calculated based on the click share within the cyclobutadiene page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
1 | 100.0% |
