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2,2,4,4-Tetramethyl-1,3-cyclobutanediol (CBDO) is an aliphatic diol. This diol is produced as a mixture of cis- and trans-isomers, depending on the relative stereochemistry of the hydroxyl groups. It is used as a monomer for the synthesis of polymeric materials, usually as an alternative to bisphenol A (BPA).
2,2,4,4-Tetramethylcyclobutanedione is the organic compound with the formula (CH 3) 4 C 4 O 2. The compound is a diketone of cyclobutane, bearing four methyl groups . It is a white solid that is used as a precursor to diverse industrial products.
Tetramethylbutane, sometimes called hexamethylethane, is a hydrocarbon with formula C 8 H 18 or (H 3 C-) 3 C-C(-CH 3) 3. It is the most heavily branched and most compact of the octane isomers, the only one with a butane (C4) backbone. Because of its highly symmetrical structure, it has a very high melting point and a short liquid range; in fact ...
The tetramethylbenzenes constitute a group of substances of aromatic hydrocarbons, which structure consists of a benzene ring with four methyl groups (–CH 3) as a substituent. [1] Through their different arrangement, they form three structural isomers with the molecular formula C 10 H 14. They also belong to the group of C 4-benzenes.
Prehnitene or 1,2,3,4-tetramethylbenzene is an organic compound with the formula C 6 H 2 (CH 3) 4, classified as an aromatic hydrocarbon. It is a flammable colorless liquid which is nearly insoluble in water but soluble in organic solvents.
It can be prepared by base-catalyzed isomerization of 2,3-dimethyl-1-butene. [2] Another route involves direct dimerization of propylene. [3] It can also be produced by photolysis of tetramethylcyclobutane-1,3-dione. [4]
It is a colorless solid. A related isomer is 1,2,3,4-tetrachloro-5-nitrobenzene. It is used as a standard for quantitative analysis by nuclear magnetic resonance. [4] [5] 1,2,4,5-Tetrachloro-3-nitrobenzene is also a fungicide used to prevent dry rot and sprouting on potatoes during storage. [6] [7]
Side effects in studies were abdominal pain (8–11% of patients as compared to 2–5% under placebo, depending on the study), diarrhea (7% versus 2–3%), nausea (4–6% versus 2–5%), vomiting (3% versus 2%), gastroenteritis (2–3% versus 1%), and opioid withdrawal syndrome (1.5–3.2% versus 0.5–1.5%). The latter was severe but ...