Potassium nickel periodate

The only method which can be used for monocyclic aromatic 1,2,3-triazines as well as for condensed 1,2,3-triazines is the oxidation of iV-aminopyrazoles 1, vV-aminoindazoles 3, 7 or other condensed A-aminopyrazoles. The following reagents were used for the oxidation lead(IV) acetate, 7,77,82,104 110,116 lead(IV) oxide/trifluoroacetic acid,77 106 nickel peroxide,1- 1 77 manganese(IV) oxide,77 sodium and potassium periodate,78-103 halogenating agents,79-82,102 111 and electrooxidation.112 Sodium periodate78,103 seems to be the best reagent for monocyclic 1,2,3-triazines. 

Mercury(I) bromide Mercury(I) carbonate Mercury(I) chloride Mercury(I) fluoride Mercury(I) iodide Mercury(I) oxalate Mercury(I) sulfate Mercury(I) thiocyanate Mercury(II) bromide Mercury(II) iodide Neodymium carbonate Nickel(II) carbonate Nickel(II) hydroxide Nickel(II) iodate Nickel(II) phosphate Palladium(II) thiocyanate Potassium hexachloroplatinate Potassium perchlorate Potassium periodate Praseodymium hydroxide... 

The curve of single-bond metallic radii for the elements of the first long period has a characteristic appearance (Fig. 3) which must be attributed in the main to variation in the type of bond orbital. The rapid decrease from potassium to chromium results from increase in bond strength due to increasing s-p and d-s—p hybridization. The linear section of the curve from chromium to nickel substantiates the assumption that the same bonding orbitals (hybrids of 2.56 3d orbitals, one 4s orbital, and 2.22 4p orbitals) are effective throughout this series. The increase in radius from nickel to copper is attributed not... 

Periodic table colored pencils 5 ml samples of 0.1 M Cu(N03)2, Fe(N03)3, Co(N03)2, Ni(N03)2 and Zn(N03)2 small samples of bromine, iodine, sulfur, carbon, copper, iron, cobalt, nickel, zinc, magnesium and calcium and 0.1M 5 ml samples of sodium chloride, NaCl, and potassium chloride, KC1 magnesium nitrate, Mg(N03)2, and calcium nitrate, Ca(N03)2. 

A mixture of 680 grams of 2-methyl-9-phenyl-2,3-dihydrol-pyridindene hydrobromide, 6,000 cc of water and about 100 grams of Raney-nickel catalyst is hydrogenated at room temperature and at about 1,000 lb pressure for a period of three hours. The catalyst is filtered. The clear filtrate is treated with a solution of 240 grams potassium thiocyanate in 400 cc of water. A heavy solid precipitates from which the supernatant liquid is decanted. 

Cobalt sesquisulphitle, CoaS3, results when a mixture of sulphur and the carbonates of cobalt and potassium arc raised to white heat.. Nickel in similar circumstances yields ICaS.3NiS, and thus resembles palladium and platinum, whereas cobalt behaves more like rhodium and iridium. The position of nickel after cobalt, in the Periodic Tabic is thus supported. 

Double sulphides of iron and nickel are present in nickel matte, and are hence of commercial importance. Double sulphides with potassium, K2S.3NiS, and barium, BaS.4NiS, may be obtained by fusing nickel, sulphur, and an alkali at a high temperature.8 They are crystalline compounds. Cobalt yields only the sesquisulphide, Co2S3, in like circumstances. Nickel thus resembles palladium and platinum, whilst cobalt resembles rhodium and iridium in these respects. The position of nickel after cobalt in the Periodic Table thus receives further justification. 

J. Sugar, C. Corliss Atomic energy levels of the iron-period elements Potassium through Nickel, Phys. Chem. Ref. Data 14, Suppl. 2 (1985)... 

The inclusion of iron, cobalt, nickel, and certain other metals in Group VIII.4 enables the alkali-metals lithium, sodium, potassium, rubidium, and caesium to be placed in their natural position as a subgroup of Group I. of the periodic system, in juxtaposition to the related sub-group containing copper, silver, and gold (p. 3). This arrangement... 

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