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1,2,3,4-Butanetetracarboxylic acid is an organic compound with the formula HO 2 CCH 2 CH(CO 2 H)CH(CO 2 H)CH 2 CO 2 H. It is one of the simplest stable tetracarboxylic acids. The compound exists as two diastereomers, meso and the (R,R)/(S,S) pair. All are white solids. The compound is produced by oxidation of tetrahydrophthalic anhydride. [1]
1,2,3,4-Cyclohexanetetrol (also named cyclohexane-1,2,3,4-tetrol, 1,2,3,4-tetrahydroxycyclohexane, or ortho-cyclohexanetetrol) is an organic compound whose molecule can be described as a cyclohexane with four hydroxyl (OH) groups substituted for hydrogen atoms on four consecutive carbon atoms. Its formula can be written C 6 H 12 O 4, C 6 H 8 (OH)
Straight-five engines typically use a firing order of 1-2-4-5-3, in order to minimise the primary vibration from the rocking couple. Straight-six engines typically use a firing order of 1-5-3-6-2-4, which results in perfect primary and secondary balance. However, a firing order of 1-2-4-6-5-3 is common on medium-speed marine engines.
1. These are commonly added to meals in order to enhance their flavor. 2. Not meeting expectations or failing. 3. A quick way to skim or browse something. 4. Names of popular artists with a ...
3. Related to money and/or monetary units. 4. All of the terms in this category precede a common three-letter noun (hint: the word typically refers to a small container that's used for drinking).
1. All of these words sound like a specific letter in the alphabet. 2. These items are known for their notched edges. 3. Expressions that show mild frustration. 4. Features of a flowing body of water.
1,2,4,5-Tetrazines are very well known and myriad 3,6-disubstituted 1,2,4,5-tetrazines are known. [2] These materials are of use in the area of energetic chemistry. The compound 3,6-di-2-pyridyl-1,2,4,5-tetrazine' [ 3 ] has two pyridine substituents and is of importance as a reagent in Diels-Alder reactions .
1,2,3,4-Tetraphenylnaphthalene is a polycyclic aromatic hydrocarbon commonly prepared in the undergraduate teaching laboratory as an introduction to the Diels-Alder reaction, in this case between benzyne, which acts as the dienophile, (generated in situ) and tetraphenylcyclopentadienone, which acts as the diene. [3]