2019年5月17日 · The number of alkanes ($\ce{C_nH_{2n+2}}$) as constitutional isomers (structural isomers) and as steric isomers is calculated by Polya's theorem (G. Polya and R. C. Read, Combinatorial Enumeration of Groups, Graphs, and Chemical Compounds, Springer (1987)). In the process of calculating constitutional isomers, one 2D structure (graph or ...

2025年1月20日 · I was reading about number of optical isomers when I read these formulas about number of optical isomers in compounds having n chiral atoms which are divided into 3 cases as follows I understood case 1 as if there will be n chiral atoms and each has two choices either d or l …

2014年12月6日 · Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.

2017年7月14日 · So, the historical meaning of mesomers is that they are isomers with very diferent properties, different functional groups. Contrarily, there are several organic chemistry textbooks (mostly Indian provenience), with somewhat contrary definition, e.g. Tewari & Vishnoi: A Textbook of Organic Chemistry, 4th Edition: Metamerism

Separating alkane/alkene isomers on the GC but the isomers have the same retention time I'm trying to differentiate between n-octane, 3-octene, and 4-octene from a mixed sample using gas chromatography, but n-octane and 3-octene seem to have …

2025年1月15日 · Naively, you might expect 8 isomers (2 x 2 x 2, two choices each for the double bond and the two chiral centers). However, if you change the configuration at the double bond for 1 or for 2, you get the same molecule (rotated around the y-axis if you swapped Cl and H).

2024年12月27日 · Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.

2022年1月24日 · Thus, if you are set to look for the isomers of alcohols with the sum formula $\ce{C3H8O}$, there are only two isomers in total. There would be a third isomer, an ether, if one allows for the joining $\ce{CH3CH2-O-CH3}$ :

2016年3月12日 · These molecules having the same formula but different structure are said to be isomers of one another, As a group of isomers of ($\ce{C5H12}$) they are reffered to as the isomers of pentane which includes n pentane So When the word isomer of something is mentioned, it will include the something and it's isomers. It's like an album with the ...

If we have one double bond in a hydrocarbon compound we have an olefin or alkene. Ethylene is the simplest example of this class of compounds. The carbons in the double bond and the 4 atoms attached to them lie in the same plane. One pair of cis-trans isomers is possible in compounds with a single double bond.