Cnh2n
The general formula for unsaturated hydrocarbons is CnH2n. Examples include alkenes and alkynes.
Alkenes are unsaturated hydrocarbons with the general formula of CnH2n where C is carbon, H is hydrogen and n is 1,2,3 and so on. They have at least on double bond present between two carbon atoms. The homologous series of alkenes starts from Ethene( C2H4) and goes on with propene, butene etc.
No, alkenes are not isomeric with cycloalkanes. Alkenes are hydrocarbons with a carbon-carbon double bond, while cycloalkanes are hydrocarbons with carbon atoms forming a closed ring structure. Isomers have the same molecular formula but different connectivity of atoms.
Alkenes are less reactive than alkenes because the π bond in alkenes is stronger and less polarizable than the σ bond in alkenes. This makes breaking the π bond in alkenes more energy-demanding, leading to lower reactivity compared to alkenes.
Alkenes are made of carbon and hydrogen, and has only one double bond and has the formula CnH2n where n is an integer. Relatively, they have the lowest BP and MP with compared to other corresponding organic compounds except the alkanes.
Alkanes, Alkenes, and Alkynes are all hydrocarbons. Alkanes are saturated hydrocarbons with single bonds and a general formula of CnH2n+2 (general formula for cycloalkanes is different) Alkenes are hydrocarbons that have the general formula CnH2n and contain a carbon-carbon double bond. Alkynes are unsaturated hydrocarbons containing a carbon-carbon triple bond with general formula C2H2n-2 so that's how they're different. The super obvious thing that makes them similar is their IUPAC nomenclature. That's the basics of it.
-ene is the suffix of alkenes, hydrocarbons with the general formula CnH2n.
Both alkenes and cycloalkanes are composed of carbon and hydrogen only, and they both have the same ratio of carbon-to-hydrogen atoms (assuming the alkene has only 1 double bond). A cycloalkane is "missing" 2 hydrogen atoms in its formula compared to the equivalent alkane (hexane is C6H14, but cyclohexane is C6H12). Similarly, hexene has two less H's than hexane, and thus has the same formula as cyclohexane, C6H12). Despite having the same formula, cyclohexane and hexene are very different molecules!
CH2 is the empirical formula for C4H8 because it is an alkene and the empirical fomula for ALL alkenes are C(n)H(2n) n being the number of molecules!!! (^-^)
Alkenes are electron donating.
You think to propene, a member of the alkenes group - C3H7.
Alkenes were first discovered by the French chemist Théophile-Jules Pelouze in 1834. He isolated the first alkene, ethylene, by heating ethanol with sulfuric acid.