Rearrangement of 1-acylaziridines to oxazolinium cations in strong acid media

1970 ◽  
Vol 35 (4) ◽  
pp. 1187-1190 ◽  
Author(s):  
Charles U. Pittman ◽  
Samuel P. McManus
Keyword(s):  
Strong Acid ◽  
Acid Media

Kinetics and mechanism of the formation of methacrylamide from 2-methyl-2-sulphatopropionamide in strong acid media

1991 ◽  
pp. 417 ◽  
Author(s):  
C. Dennis Hall ◽  
Christopher J. Leeding ◽  
Stephen Jones ◽  
Stephen Case-Green ◽  
Ian Sanderson ◽  
...  
Keyword(s):  
Strong Acid ◽  
Kinetics And Mechanism ◽  
Acid Media

ChemInform Abstract: PHOTOREACTIONS OF KETONES IN STRONG ACID MEDIA. A NOVEL TYPE REARRANGEMENT IN THE CYCLIC β-DICARBONYL SYSTEM

1980 ◽  
Vol 11 (14) ◽  
Author(s):  
T. SATO ◽  
K. NAGUMO ◽  
K. SAITO ◽  
T. OHYAMA ◽  
R. NAKANE
Keyword(s):  
Strong Acid ◽  
Acid Media

PHOTOREACTIONS OF KETONES IN STRONG ACID MEDIA. A NOVEL TYPE REARRANGEMENT IN CYCLIC β-DICARBONYL SYSTEM

1979 ◽  
Vol 8 (10) ◽  
pp. 1203-1206 ◽  
Author(s):  
Tadashi Sato ◽  
Katsuyuki Nagumo ◽  
Kimitoshi Saito ◽  
Toshiyuki Ohyama ◽  
Ryohei Nakane
Keyword(s):  
Strong Acid ◽  
Acid Media

Extraction of Dithiocarbamate Chelates of Ni(II), Cu(II), Zn(II)

1996 ◽  
Vol 61 (5) ◽  
pp. 673-680
Author(s):  
Drahomír Oktavec ◽  
Jozef Lehotay ◽  
Viktor Vrábel ◽  
Elena Korgová
Keyword(s):  
Strong Acid ◽  
Optimum Conditions ◽  
Time Intervals ◽  
Acid Media ◽  
Ph Values ◽  
Quantitative Extraction ◽  
Maximum Extraction ◽  
Short Time ◽  
Alkali Salts ◽  
Acid Region

Extraction has been investigated of chelates of alkali salts of dithiocarbamic (DTC) acids derived from (R-) dimethyl-, diethyl-, dipropyl-, diisopropyl-, dibutyl-, diisobutyl-, dipentyl-, and dihexylamine, piperidine, and morpholine with Ni(II), Cu(II), and Zn(II) from aqueous solutions of various pH values into chloroform for various time intervals. The optimum conditions have been determined for the maximum extraction yields of the metal connected with the minimum extraction yields of excess DTC ligand. The extraction of DTC chelates of Ni(II), Cu(II), and Zn(II) is best accomplished in a reaction period of 4.5 min in strong acid region (Ni, Cu) or in alkaline region with buffers of pH 8.5-9.0 (Zn). The advantage of DTC as compared with many other reagents lies in the possibility of quantitative extraction of Ni(II) and Cu(II) from strong acid media since in this region the excess DTC ligand is completely decomposed to carbon disulfide and amine in short time, and thus it does not interfere with the subsequent spectrophotometric determination.

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