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A homologous series is a group of compounds that differ by a constant unit, generally a methylene (−CH 2 −) group. The reactants undergo a homologation when the number of a repeated structural unit in the molecules is increased. The most common homologation reactions increase the number of methylene (−CH 2 −) units in saturated chain ...
The name "homologous series" is also often used for any collection of compounds that have similar structures or include the same functional group, such as the general alkanes (straight and branched), the alkenes (olefins), the carbohydrates, etc. However, if the members cannot be arranged in a linear order by a single parameter, the collection ...
Alkenes are generally colorless non-polar compounds, somewhat similar to alkanes but more reactive. The first few members of the series are gases or liquids at room temperature. The simplest alkene, ethylene (C 2 H 4) (or "ethene" in the IUPAC nomenclature) is the organic compound produced on the largest scale industrially. [5]
It contains one triple bond and has two isomeric organic chemical compounds: 1-Butyne (ethylacetylene) 2-Butyne (dimethylacetylene) See also. C 4 H 6; Butane (C 4 H 10)
The angle between the two H atoms is 121.5°, similar to the theoretically ideal angle formed in alkenes between sp 2 carbon atom and H substituents. [5] Ketenes are unstable and cannot be stored. In the absence of nucleophiles with which to react, ethenone dimerises to give β-lactone, a cyclic ester. If the ketene is disubstituted, the ...
An acyclic alkyl has the general formula of −C n H 2n+1. A cycloalkyl group is derived from a cycloalkane by removal of a hydrogen atom from a ring and has the general formula −C n H 2n−1. [2] Typically an alkyl is a part of a larger molecule. In structural formulae, the symbol R is used to designate a generic (unspecified) alkyl group.
The same functional group will undergo the same or similar chemical reactions regardless of the rest of the molecule's composition. [ 1 ] [ 2 ] This enables systematic prediction of chemical reactions and behavior of chemical compounds and the design of chemical synthesis .
2 994 664 179 967 370 611: 3.486 951 955 119 47 × 10 21: C 51 H 104: n-henpentacontane: 52 8 031 081 780 535 296 591: 1.092 126 741 043 54 × 10 22: C 52 H 106: n-dopentacontane: 53 2.155 777 191 357 26 × 10 19: 3.423 721 299 907 32 × 10 22: C 53 H 108: n-tripentacontane: 54 5.791 918 087 314 84 × 10 19: 1.074 254 564 589 75 × 10 23: C 54 ...