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A cyclohexane molecule in chair conformation. Hydrogen atoms in axial positions are shown in red, while those in equatorial positions are in blue. Cyclohexane conformations are any of several three-dimensional shapes adopted by molecules of cyclohexane. Because many compounds feature structurally similar six-membered rings, the structure and ...
1,2-Diaminocyclohexane (DACH) is an organic compound with the formula (CH 2) 4 (CHNH 2) 2. It is a mixture of three stereoisomers: cis -1,2-diaminocyclohexane and both enantiomers of trans -1,2-diaminocyclohexane. The mixture is a colorless, corrosive liquid, although older samples can appear yellow. It is often called DCH-99 and also DACH.
Critical point. 554 K (281 °C), 4070 kPa. Std enthalpy change of fusion, Δ fusH o. 2.68 kJ/mol crystal I → liquid. Std entropy change of fusion, Δ fusS o. 9.57 J/ (mol·K) crystal I → liquid. Std enthalpy change of vaporization, Δ vapH o. 32 kJ/mol. Std entropy change of vaporization, Δ vapS o.
Structural isomer. In chemistry, a structural isomer (or constitutional isomer in the IUPAC nomenclature [ 1 ]) of a compound is another compound whose molecule has the same number of atoms of each element, but with logically distinct bonds between them. [ 2 ][ 3 ] The term metamer was formerly used for the same concept. [ 4 ]
1,2-Dimethylcyclopropane is a cycloalkane consisting of a cyclopropane ring substituted with two methyl groups attached to adjacent carbon atoms. [1] It has three stereoisomers, one cis -isomer and a pair of trans - enantiomers, which differ depending on the orientation of the two methyl groups. As with other cyclopropanes, ring tension results ...
trans -but-2-ene. Cis–trans isomerism, also known as geometric isomerism, describes certain arrangements of atoms within molecules. The prefixes " cis " and " trans " are from Latin: "this side of" and "the other side of", respectively. [ 1 ] In the context of chemistry, cis indicates that the functional groups (substituents) are on the same ...
Methylcyclohexane(cyclohexylmethane) is an organic compoundwith the molecular formula is CH3C6H11. Classified as saturated hydrocarbon, it is a colourless liquidwith a faint odor. Methylcyclohexane is used as a solvent. It is mainly converted in naphtha reformersto toluene.[4]
A Newman projection is a drawing that helps visualize the 3-dimensional structure of a molecule. [1] This projection most commonly sights down a carbon-carbon bond, making it a very useful way to visualize the stereochemistry of alkanes. A Newman projection visualizes the conformation of a chemical bond from front to back, with the front atom ...