Thallium nitrate oxidation

The reaction mixture first turns muddy brown, due to the hydrolysis of thallium(III) nitrate to thallium(III) hydroxide and thallium(III) oxide, and then yellow with the separation of colorless thallium(I) nitrate. 

Thallium metal, 24 627—629 Thallium nitrates, 24 633 Thallium organometallics, 24 633—635 Thallium oxides, 24 632—633 Thallium poisonings, 24 637, 638-639 Thallium stress test, 24 629 Thallium sulfates, 24 628, 633 Thaumatin, 72 43, 24 241-242 Thaumatin II, 24 242 Theaspiranes, 24 572 Thebaine, 2 89 Thenardite, 22 863, 5 785t Thenoyltrifluoroacetone molecular formula, 5 712t Theobroma cacao, 6 350 Theobromine, 2 105-106... 

Thallium nitrate is prepared by reacting thallium metal, thaUous oxide, TbO or thaUous hydroxide, TlOH, with nitric acid followed by crystallization ... 

Our first study of these systems was the synthesis in 1998 of the polymeric complex [ 1( 6 5)2( )2] through the reaction between triphenylphosphine oxide, thallium nitrate and lithium bis(pentafluorophenyl)aurate(I) [71]. This complex consisted of an extended unsupported linear chain of alternate gold and thallium centers. These atoms displayed Au-Tl interactions of 3.0358(8) and 3.0862(8) A, and the thallium atoms showed a distorted pseudo-trigonal-bipyramidal environment, taking into account the stereochemically active inert pair of this atom. As described below, the environment around thallium is one of the main factors that affects the optical properties of these mixed systems. 

Ignites on contact with metal oxides (e.g., barium peroxide, chromium trioxide, copper oxide, lead dioxide, manganese dioxide, nickel oxide, silver(I) oxide, silver(II) oxide, sodium peroxide, thallium(III) oxide, mercury oxide, calcium oxide, nickel oxide), oxidants (e.g., silver bromate, heptasilver nitrate octaoxide, dibismuth dichromium nonaoxide, mercury(I) bromate, lead(II) hypochlorite, copper chromate, fluorine, nitric acid, sodium peroxide, lead(IV) oxide), rust, soda-lime + air. Reacts violently with NI3, NF3, p-bromobenzenediazonium chloride, OF2, F2, Cu, CIO, BrFs,... 

Preparation. The salt is prepared by dissolving 50 g. of thallium(IIl) oxide in 150 ml. of warm concentrated nitric acid and cooling the pale-yellow solution to 0°. Thallium(lll) nitrate trihydrate separates and is dried under vacuum over P2O,. The salt is stable if stored in tightly scaled bottles. 

The action of n-butyllithium in THF at low temperature leads to the anion. After reaction with an electrophilic compound, e hydrolysis can generally be carried out in polar solvents (acetone, alcohols, acetonitrile) in the presence of mercury(II) chloride or oxide and water.In other cases, NBS, - chloramine T, cerium(IV) ammonium nitrate, n-tributyltin hydride, trialkyloxonium tetrafluorobor-ate, thallium nitrate or photochemistry can be used. Desulfurization by Raney nickel gives hydro-carbons. ... 

Heptasilver nitrate octaoxide Alone, or Sulfides Lead(ll) chlorite Antimony sulfide Potassium chlorate Metal sulfides Potassium nitrate Metal sulfides Silver(I) oxide Metal sulfides Thallium(III) oxide Sulfur, etc. 

Thallium(l) dithiocarbonazidate, see Thallium(l) azidodithiocarbonate, Thallium(lll) nitrate, 4762 Thallium(lll) oxide, 4854 Thallium(l) iodacetylide, 0984... 

Farkas et al., [123] synthesised different natural isoflavanones (255) and isoflavans (256) by oxidative rearrangement of 2-hydroxy chalcones (254) with thallium nitrate in methanol followed by acid-catalyzed cyclization as shown in Fig. (11). 

Thus it has been used as the first stage to obtain the starting material for the microbiological method with CSD-10 and simplified in more recent work leading to a synthesis of estrone in four steps from 3p-acetoxy-19-hydroxyandrost-5-en-17-one (ref. 116). Cholesteryl acetate was transformed by standard methods to the required androstane compound shown in the following scheme, which with hypobromous acid followed by lead tetraacetate and zinc reduction (cf. ref. 115) afforded the 19-hydroxy derivative. This with thallium nitrate in dioxan underwent loss of formaldehyde and hydration with water to afford the 19-nor-10p-alcohol in 70% yield. The diol obtained by saponification was converted by Oppenauer oxidation with N-methylpiperid-4-one as hydride aceptor (ref. 117) and afforded a 78% yield of the enone which was transformed almost quantitatively into... 

Mercuric salts induce oxidative rearrangement of cyclic alkenes and give cycloalkane carboxaldehydes. Cyclohexene, for example, gave cyclopentane carboxaldehyde (404) in 53% yield. Acyclic alkenes such as 2-butene can also be oxidized with mercuric sulfate and sulfuric acid, giving 2-butanone in this case.566 Thallium nitrate [T1(N03)3] is an important reagent for the oxidative rearrangement of cyclic alkenes.567 The reaction is not restricted to carbocyclic compounds, but can also be applied to heterocyclic compounds as shown by the oxidation of 3,4-dihydro-277-pyran (405) to the dimethyl acetal (406) in 65% yield.568... 

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