THERMOCHEMISTRY OF POTASSIUM PERMANGANATE, POTASSIUM MOLYBDATE, POTASSIUM CHLORATE, SODIUM CHLORATE, SODIUM CHROMATE AND SODIUM DICHROMATE

1960 ◽  
Vol 64 (3) ◽  
pp. 376-377 ◽  
Author(s):  
Thomas Nelson ◽  
Calvin Moss ◽  
Loren G. Hepler
Keyword(s):  
Potassium Permanganate ◽  
Sodium Chlorate ◽  
Potassium Chlorate ◽  
Sodium Chromate ◽  
Sodium Dichromate

Chemistry of the Podocarpaceae. XXXIV. Some oxidation products of (13R)-Labda-8(17),14-dien-13-ol (Manool)

1971 ◽  
Vol 24 (11) ◽  
pp. 2365 ◽  
Author(s):  
RC Cambie ◽  
KN Joblin ◽  
AF Preston
Keyword(s):  
Nucleophilic Substitution ◽  
Potassium Permanganate ◽  
Hydroxy Acid ◽  
Methyl Ketone ◽  
Major Product ◽  
Oxidation Products ◽  
Lithium Aluminium Hydride ◽  
Methyl Ketones ◽  
Sodium Dichromate ◽  
Lithium Aluminium

Some products from the oxidation of manool (3) are examined. Potassium permanganate gives, inter alia, the hitherto unreported compound (16) while sodium dichromate gives the methyl ketone (5) and, as the major product, a mixture of (Z)- and (E)-α,β-unsaturated aldehydes (21). Hypoiodite oxidation of the methyl ketone (5) gives the α-hydroxy acid (26) in addition to the expected acid (6). Products of nucleophilic substitution have also been obtained from the hypoiodite oxidation of the methyl ketones (9) and (37). Peracid oxidation of the methyl ketone (5) gives the epoxy acetate (41) which, on reduction with lithium aluminium hydride, affords the diol (7), from which the odoriferous oxide (30) can be prepared. Oxidations leading to formation of the dione (10) are investigated.

scholarly journals Polarization Studies on Inhibitory Effect of Chromates and Dichromates on Corrosion of Tin Coated Steel in 0.5M Monochloroacetic Acid

2008 ◽  
Vol 5 (2) ◽  
pp. 302-308
Author(s):  
Sangita Sharma ◽  
Kinnari H. Parikh ◽  
Mahesh V. Kadia ◽  
Falguni D. Thakkar ◽  
Dhara D. Patel
Keyword(s):  
Corrosion Behaviour ◽  
Potassium Dichromate ◽  
Corrosion Current ◽  
Inhibitory Effect ◽  
Open Circuit ◽  
Potassium Chromate ◽  
Monochloroacetic Acid ◽  
Sodium Chromate ◽  
Coated Steel ◽  
Sodium Dichromate

Chromates and Dichromates have been tested for its inhibitory effects towards tin coated steel in 0.5M monochloroacetic acid. The corrosion behaviour of potassium chromate, sodium chromate, potassium dichromate, sodium dichromate and ammonium dichromate was studied by polarization curves, Tafel parameters like Tafel slopes, extrapolation of cathodic Tafel line and intersection of cathodic and anodic line at open circuit potential in presence of inhibitors have been tabulated along with other electrochemical parameters and corrosion current have been calculated from Tafel lines. The efficiencies are calculated and compared reasonably well with those obtained from loss in weight data. All the inhibitors induce a significant increase of potential positive and direction accounts for cathodic polarization. The Icorrhas also been calculated and that accounts well for cathodic reactions in presence of chromates and dichromates as inhibitors.

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