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Hg-EDTA

In a similar reaction, tertiary amines are converted to amides " and cyclic tertiary amines (e.g., 30) can be converted to lactams by oxidation with Hg —EDTA complex in basic solution. [Pg.1535]

Potentiometric EDTA titrations are best carried out with a mercury pool electrode (Figure 5.6) or a gold amalgam electrode. When this electrode dips into a solution containing the analyte together with a small amount of added Hg-EDTA complex, three interdependent reactions occur. For example, at pH = 8 the half cell reaction (a) which determines the electrode potential is related to the solution equilibrium by (b) and (c). [Pg.212]

The conditional formation constant for Hg(EDTA)2- must be greater than K f for Mg(FDTA)2, or else Mg2+ is not displaced from Mg(EDTA)2-. [Pg.244]

The precipitate was filtered, washed, dissolved in an organic solvent, and treated with excess Hg(EDTA)2- ... [Pg.246]

The mixture of EDTA plus Hg(EDTA)2- in the cathode serves as a mercuric ion J buffer that fixes the concentration of Hg2+. This concentration, in turn, deter-mines the cell voltage. i... [Pg.288]

Suppose that 50.0 mL of 0.010 0 M MgS04 are titrated with 0.020 0 M EDTA at pH 10.0, using the apparatus in the figure with an S.C.E. reference electrode. Analyte contains 1.0 X 10 4M Hg(EDTA)2- added at the beginning of the titration. Calculate the... [Pg.322]

Cyclic amines are oxidized to lactams using a mixture of RuCls and NaI04. Lactams are also formed using KMn04 with benzyltriethylammonium chloride. Tertiary amines are converted to amides and cyclic tertiary amines can be converted to lactams by oxidation with Hg -EDTA complex in basic solution. Lactams, which need not be A-substituted, can be converted to cyclic imides by oxidation with a hydroperoxide or peroxyacid and an Mn(II) or Mn(III) salt. Lactams are oxidized to cyclic imides with oxygen and Co(OAc)2 in the presence A-hydroxysuccinimide. ... [Pg.1759]

Dehydrogenation of amine derivatives with Hg-EDTA can give rise to hydroxy lactams by the following sequence ... [Pg.324]

The stability of N-EDTA must be less than that of Hg-EDTA (a very stable chelate is (Hg-EDiA) 10 ). A Hg Hg-EDTA electrode can be used to monitor N" " during the course of a titration with EDTA. Starting with the HglHg " electrode, derive the above equation. This represents a metal-metal chelate-metal ion electrode. [Pg.410]

Hg is determined in this manner. The formation constant of Hg(EDTA) " must be greater than the formation constant of Mg(EDTA) or else the displacement of Mg from Mg(EDTA) would not occur. [Pg.287]

Neighbouring group participation in the dehydrogenation of ort/jo-substituted cyclic anilines by Hg-EDTA has been studied for a range of substrates. ... [Pg.213]

Alternatively, a J "Shaped electrode with a small mercury f)ool may be used together with a small amount of added Hg-EDTA complex. This acts in a similar way to the Class 2 electrodes, where the complexes determine the concentration of ions in contact with the mercury f)ool ... [Pg.91]


See other pages where Hg-EDTA is mentioned: [Pg.1328]    [Pg.287]    [Pg.287]    [Pg.759]    [Pg.95]    [Pg.97]    [Pg.39]    [Pg.39]    [Pg.622]    [Pg.624]    [Pg.624]    [Pg.627]    [Pg.676]    [Pg.676]    [Pg.677]    [Pg.343]    [Pg.1288]    [Pg.413]    [Pg.286]    [Pg.1141]    [Pg.935]    [Pg.1353]   
See also in sourсe #XX -- [ Pg.343 ]




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