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  2. Methyl group - Wikipedia

    en.wikipedia.org/wiki/Methyl_group

    In organic chemistry, a methyl group is an alkyl derived from methane, containing one carbon atom bonded to three hydrogen atoms, having chemical formula CH 3 (whereas normal methane has the formula CH 4). In formulas, the group is often abbreviated as Me. This hydrocarbon group occurs in many organic compounds. It is a very stable group in ...

  3. Schoenflies notation - Wikipedia

    en.wikipedia.org/wiki/Schoenflies_notation

    In three dimensions, there are an infinite number of point groups, but all of them can be classified by several families. C n (for cyclic) has an n-fold rotation axis.. C nh is C n with the addition of a mirror (reflection) plane perpendicular to the axis of rotation (horizontal plane).

  4. Halomethane - Wikipedia

    en.wikipedia.org/wiki/Halomethane

    The main problems with this method are that it cogenerates HCl and it produces mixtures of different products. Using CH 4 in large excess generates primarily CH 3 Cl and using Cl 2 in large excess generates primarily CCl 4, but mixtures of other products will still be present. Halogenation of methanol. This method is used for the production of ...

  5. List of unsolved problems in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Protein folding problem: Is it possible to predict the secondary, tertiary and quaternary structure of a polypeptide sequence based solely on the sequence and environmental information? Inverse protein-folding problem: Is it possible to design a polypeptide sequence which will adopt a given structure under certain environmental conditions?

  6. Free-radical halogenation - Wikipedia

    en.wikipedia.org/wiki/Free-radical_halogenation

    In organic chemistry, free-radical halogenation is a type of halogenation. This chemical reaction is typical of alkanes and alkyl-substituted aromatics under application of UV light. The reaction is used for the industrial synthesis of chloroform (CHCl 3), dichloromethane (CH 2 Cl 2), and hexachlorobutadiene. It proceeds by a free-radical chain ...

  7. Chloroform - Wikipedia

    en.wikipedia.org/wiki/Chloroform

    Chloroform, [10] or trichloromethane (often abbreviated as TCM), is an organochloride with the formula C H Cl 3 and a common solvent.It is a volatile, colorless, sweet-smelling, dense liquid produced on a large scale as a precursor to refrigerants and PTFE. [11]

  8. Methyltrichlorosilane - Wikipedia

    en.wikipedia.org/wiki/Methyltrichlorosilane

    Methyltrichlorosilane results from the direct process of chloromethane with elemental silicon in the presence of a copper catalyst, usually at a temperature of at least 250 °C.

  9. Photochlorination - Wikipedia

    en.wikipedia.org/wiki/Photochlorination

    The photochlorination of hydrocarbon is unselective, although the reactivity of the C-H bonds is tertiary>secondary>primary. At 30 °C the relative reaction rates of primary, secondary and tertiary hydrogen atoms are in a relative ratio of approximately 1 to 3.25 to 4.43.