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  2. Thiol - Wikipedia

    en.wikipedia.org/wiki/Thiol

    The S−H bond in thiols is weak compared to the O−H bond in alcohols. For CH 3 X−H, the bond enthalpies are 365.07 ± 2.1 kcal/mol for X = S and 440.2 ± 3.0 kcal/mol for X = O. [21] Hydrogen-atom abstraction from a thiol gives a thiyl radical with the formula RS •, where R = alkyl or aryl.

  3. Self-assembled monolayer - Wikipedia

    en.wikipedia.org/wiki/Self-assembled_monolayer

    [11] [12] For example, the trichlorosilane head group of an FDTS molecule reacts with a hydroxyl group on a substrate to form a very stable covalent bond [R-Si-O-substrate] with an energy of 452 kJ/mol. [citation needed] Thiol-metal bonds are on the order of 100 kJ/mol, making them fairly stable in a variety of temperatures, solvents, and ...

  4. Thiomer - Wikipedia

    en.wikipedia.org/wiki/Thiomer

    By using thiolated polymers this essential shortcoming can be overcome. Because of the formation of inter- and intrachain disulfide bonds during the swelling process, the stability of the polymeric drug carrier matrix is strongly improved. Hence, a controlled drug release for numerous hours is guaranteed.

  5. Thioureas - Wikipedia

    en.wikipedia.org/wiki/Thioureas

    The C–N bond distances are short. [1] Thioureas occurs in two tautomeric forms. For the parent thiourea, the thione form predominates in aqueous solutions. [2] The thiol form, known as an isothiourea, can be encountered in substituted compounds such as isothiouronium salts.

  6. Thiyl radical - Wikipedia

    en.wikipedia.org/wiki/Thiyl_radical

    Because S–H bonds are about 20% weaker than C–H bonds, thiyl radicals are relatively easily generated from thiols RSH. [1] Thiyl radicals are intermediates in the thiol-ene reaction, which is the basis of some polymeric coatings and adhesives. They are generated by hydrogen-atom abstraction from thiols using initiators such as AIBN: [2]

  7. Thiocarboxylic acid - Wikipedia

    en.wikipedia.org/wiki/Thiocarboxylic_acid

    The conjugate base of thioacetic acid, thioacetate, is a reagent used for installing thiol groups via the displacement of alkyl halides by a two-step process. The halide is displaced to give a thioester intermediate, which is then hydrolyzed: R−X + CH 3 COS − → R−SC(O)CH 3 + X −

  8. Dithiol - Wikipedia

    en.wikipedia.org/wiki/Dithiol

    A common 1,4-dithiol is dithiothreitol (DTT), HSCH 2 CH(OH)CH(OH)CH 2 SH, sometimes called Cleland's reagent, for to reduce protein disulfide bonds. Oxidation of DTT results a stable six-membered heterocyclic ring with an internal disulfide bond. Reduction of a typical disulfide bond by DTT via two sequential thiol-disulfide exchange reactions.

  9. Chymopapain - Wikipedia

    en.wikipedia.org/wiki/Chymopapain

    The peptide bond is now broken and the carbonyl group is remade. The NH 2 R group is released from the histidine. The bond between the thiol group from the cysteine and the carbon is broken and a NHR group replaces it. When this two bonds are broken, the catalytic triad from the chymopapain is available to be used again.