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  2. Acid dissociation constant - Wikipedia

    en.wikipedia.org/wiki/Acid_dissociation_constant

    Nitric acid, with a pK value of around −1.7, behaves as a strong acid in aqueous solutions with a pH greater than 1. [23] At lower pH values it behaves as a weak acid. pK a values for strong acids have been estimated by theoretical means. [24] For example, the pK a value of aqueous HCl has been estimated as −9.3.

  3. Carbanion - Wikipedia

    en.wikipedia.org/wiki/Carbanion

    These values below are pK a values determined in dimethylsulfoxide (DMSO), which has a broader useful range (~0 to ~35) than values determined in water (~0 to ~14) and better reflect the basicity of the carbanions in typical organic solvents. Values below less than 0 or greater than 35 are indirectly estimated; hence, the numerical accuracy of ...

  4. 1,8-Diazabicyclo (5.4.0)undec-7-ene - Wikipedia

    en.wikipedia.org/wiki/1,8-Diazabicyclo(5.4.0...

    1,8-Diazabicyclo[5.4.0]undec-7-ene, or more commonly DBU, is a chemical compound and belongs to the class of amidine compounds. It is used in organic synthesis as a catalyst, a complexing ligand, and a non-nucleophilic base. [3]

  5. Non-nucleophilic base - Wikipedia

    en.wikipedia.org/wiki/Non-nucleophilic_base

    As the name suggests, a non-nucleophilic base is a sterically hindered organic base that is a poor nucleophile.Normal bases are also nucleophiles, but often chemists seek the proton-removing ability of a base without any other functions.

  6. Lewis acids and bases - Wikipedia

    en.wikipedia.org/wiki/Lewis_acids_and_bases

    compounds of O, S, Se and Te in oxidation state −2, including water, ethers, ketones; The most common Lewis bases are anions. The strength of Lewis basicity correlates with the pK a of the parent acid: acids with high pK a 's give good Lewis bases. As usual, a weaker acid has a stronger conjugate base.

  7. 1,1,3,3-Tetramethylguanidine - Wikipedia

    en.wikipedia.org/wiki/1,1,3,3-Tetramethylguanidine

    Tetramethylguanidine is an organic compound with the formula HNC(N(CH 3) 2) 2. This colourless liquid is a strong base, as judged by the high pK a of its' conjugate acid. [2] It was originally prepared from tetramethylthiourea via S-methylation and amination, but alternative methods start from cyanogen iodide. [3]

  8. 1,8-Bis (dimethylamino)naphthalene - Wikipedia

    en.wikipedia.org/wiki/1,8-Bis(dimethylamino...

    This compound is a diamine in which the two dimethylamino groups are attached on the same side (peri position) of a naphthalene ring. This molecule has several very interesting properties; one is its very high basicity; another is its spectroscopic properties.

  9. Hydroxide - Wikipedia

    en.wikipedia.org/wiki/Hydroxide

    The pK a value for dissociation of a C–H bond is extremely high, but the pK a alpha hydrogens of a carbonyl compound are about 3 log units lower. Typical pK a values are 16.7 for acetaldehyde and 19 for acetone. [48] Dissociation can occur in the presence of a suitable base. RC(O)CH 2 R' + B ⇌ RC(O)CH − R' + BH +