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Encyclopedia > Acetal

An acetal is a functional group or molecule containing the functional group of a carbon bonded to two -OR groups. "Acetal" can also refer to polyoxymethylene, an engineering plastic containing acetal groups. In ecology functional groups are collections of organisms based on morphological, physiological, behavioral, biochemical, or environmental responses or on trophic criteria. ... A molecule is the smallest particle of a pure chemical substance that still retains its chemical composition and properties. ... General Name, Symbol, Number carbon, C, 6 Chemical series nonmetals Group, Period, Block 14, 2, p Appearance black (graphite) colorless (diamond) Atomic mass 12. ... Dutch East India Company bond, issued in 1623. ... Polyoxymethylene, also known as polytrioxane and polyformaldehyde. ... Engineering plastics are plastics which regain their original shape after deformation. ...


image:Acetal.png Acetal structure PPCHTeX source: startchemical[size=big] chemical[ONE,SB1357,Z01357][C,O,O,R,H] chemical[MOV3,SB1,Z1][R] chemical[MOV8,SB1,Z1][R] stopchemical This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ...



Acetals can be used as carbonyl-protecting groups. In chemistry, a carbonyl group is a functional group composed of a carbon atom double-bonded to an oxygen atom. ... A Protecting group or protective group is introduced into a molecule by chemical modification of a functional group in order to obtain chemoselectivity in a subsequent chemical reaction. ...


Reactions

Synthesis

  1. Nucleophilic addition of an alcohol to a resonance stabilized cation
    • hemiacetal + alcohol + acid (catalyst) ↔ acetal + water

An acetal can, under certain conditions, be converted back into a hemiacetal and an alcohol. In organic chemistry, a nucleophilic addition reaction is an addition reaction where in a chemical compound a pi bond is removed by the creation of two new covalent bonds by the addition of a nucleophile. ... A hemiacetal is a functional group or compound containing the function group in the form of: where R and R are any carbon backbones. ... An acid (often represented by the generic formula AH) is typically a water-soluble, sour-tasting chemical compound. ... Water (from the Old English word wæter; c. ... A hemiacetal is a functional group or compound containing the function group in the form of: where R and R are any carbon backbones. ... In general usage, alcohol (from Arabic al-khwl الكحول, or al-ghawl الغول) refers almost always to ethanol, also known as grain alcohol, and often to any beverage that contains ethanol (see alcoholic beverage). ...


  Results from FactBites:
 
Acetal POM Sheet, Rod and Tube by Excel Plastics (144 words)
Acetal POM Sheet, Rod and Tube by Excel Plastics
Excel Plastics is a distributor of Acetal POM Plastic Sheet, Round Rod, Hex Rod, Bar Stock, Balls, Discs and Round Tubes.
We have glass filled, chemical resistant, antistatic, low friction, general purpose, high elongation, and Teflon® filled acetals.
Acetal Copolymer On B2BManufactures.Com From China & Taiwan Acetal Copolymer Manufacturers& Suppliers (612 words)
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