Olefin, compound made up of hydrogen and carbon that contains one or more pairs of carbon atoms linked by a double bond. Olefins are important commercial petrochemicals and are produced through various methods, including fluid catalytic cracking.

In organic chemistry, terminal alkenes (alpha-olefins, α-olefins, or 1-alkenes) are a family of organic compounds which are alkenes (also known as olefins) with a chemical formula CxH2x, distinguished by having a double bond at the primary, alpha (α), or 1- position. [1] .

Straight-chain terminal alkenes, also called linear alpha olefins (LAO) or normal alpha olefins (NAO), are alkenes (olefins) having a chemical formula CnH2n, distinguished from other alkenes with a similar molecular formula by being terminal alkenes, in which the double bond occurs at the alpha (α-, 1- or primary) position, and by having a linea...

Olefin metathesis, or alkene metathesis, is an important process in petroleum refining and in the synthesis of important compounds such as pharmaceuticals. The mechanism of olefin metathesis is related to pericyclic reactions like Diels Alder and [2+2] reactions.

Sep 12, 2021 · Olefin is an older term for an alkene that is still commonly used in the industry. These compounds make up a significant fraction of commercially-used polymers today.

Nov 7, 2022 · This Perspective highlights key advances on controlled chain walking and suppression of chain transfer reactions in late-transition-metal-mediated olefin polymerization to prepare well-defined polyolefins.

May 5, 2006 · We report a catalytic system that produces olefin block copolymers with alternating semicrystalline and amorphous segments, achieved by varying the ratio of α-olefin to ethylene in the two types of blocks.

Olefins, also known as alkenes, are hydrocarbons that feature one or more double bonds between two adjacent carbon atoms. This term is generally used to denote the hydrocarbons that contain at least one double bond.

Apr 24, 2017 · Olefins form different compounds based on their structure. Some have short chains with only two, three or four carbons, such as ethylene. Others form long chains or closed ring structures. Some have a combination of both. Alkenes are insoluble and exist in all three states of matter.

Olefin metathesis produces longer-chain "internal olefins" from shorter chain "terminal olefins". That leaves a longer-chain alkylidene on the metal, ready to be attached to another long chain through subsequent [2+2] addition and reversion reactions.