What does alkylation mean?
What does alkylation mean?
Alkylation is the migration of an alkyl substituent from one molecule to another via an alkyl carbocation, a carbanion, a free radical, and a carbene, which are generated from electrophilic alkylating agents such as olefin and alkyl halide in the presence of a strong mineral acid or Lewis acid like metal oxide …
What does alkylation of DNA do?
Alkylation is the transfer of an alkyl group from one molecule to another. The alkyl group may be transferred as an alkyl carbocation, a free radical, a carbanion or a carbene (or their equivalents). In medicine, alkylation of DNA is used in chemotherapy to damage the DNA of cancer cells. …
What causes over alkylation?
Over alkylation can be a problem since the product is more reactive than the starting material. This can usually be controlled with an excess of the benzene. The Lewis acid catalyst AlCl3 often complexes to aryl amines making them very unreactive.
What is alkyl halide?
Alkyl halides (also known as haloalkanes) are compounds in which one or more hydrogen atoms in an alkane have been replaced by halogen atoms (fluorine, chlorine, bromine or iodine).
What is alkylate fuel?
Alkylate is a synthetically produced petrol component. The alkylation process takes place at oil refineries. Alkylate is formed from the excess gases produced in the distillation of crude oil and oil cracking. Alkylate is one of the cleanest petroleum products that can be produced.
Is alkylate a chemical?
Alkylation is a chemical process by which an alkyl group is attached to an organic substrate molecule via addition or substitution. An alkyl group is an alkane molecule that is missing a hydrogen atom. For example, methyl groups are the simplest alkyls and result from the removal of a hydrogen atom from methane.
What are the types of DNA damage?
DNA damage can be subdivided into two types: (1) endogenous damage caused by reactive oxygen species (ROS) that are derived from metabolic byproducts and (2) exogenous damage caused by radiation (UV, X-ray, gamma), hydrolysis, plant toxins, and viruses.
What is alkylation damage repair?
Alkylation damage repair involves multiple partially redundant pathways, which include direct reversal by O6-methylguanine DNA methyltransferase (MGMT), the ALKB family of demethylases, and base excision repair (BER). Alkylation chemotherapy is one of the most widely used systemic therapies for cancer.
What are alkylates and how are they made?
Alkylates are a mix of high octane, low vapor pressure branched chain paraffinic hydrocarbons that can be made from crude oil through well established refinery processes, and are highly favored as streams for blending into gasoline. Scott A. Stout, Allen D. Uhler, in Standard Handbook Oil Spill Environmental Forensics (Second Edition), 2016
What is the volatility of alkylate?
Alkylate is high in octane but has low volatility and can be added to motor gasoline and aviation gasoline to increase octane while meeting stringent volatility specifications. Regardless of the acid-catalyst used, the alkylation process reacts with a hydrocarbon that has double bonds,…
What is alkylation and why is it important?
Alkylation is an important source for octane in gasoline. Alkylation (al-kuh- ley -shun) is a secondary refinery unit operation that many refineries in the United States have because it adds high octane hydrocarbons to motor and aviation gasoline. High octane hydrocarbons are needed to help prevent autoignition of gasoline (knocking)…
What does alcylate mean?
Alkylate is considered a premium gasoline blendstock because of its combination of properties: Low sulfur content – Alkylate has no sulfur Low aromatics content – Alkylate contains no aromatics Low vapor pressure – Alkylate has a low vapor pressure