Polarographic study of calomel electrode in anhydrous formic acid

1973 ◽  
Vol 45 (11) ◽  
pp. 1954-1956 ◽  
Author(s):  
Michel. Arnac ◽  
Gilles. Verboom
Keyword(s):  
Formic Acid ◽  
Polarographic Study ◽  
Anhydrous Formic Acid

Basic Chromium(III) Formate: Reaction of Chromiiim(III) Chloride with Formic Acid

1979 ◽  
Vol 34 (2) ◽  
pp. 160-162 ◽  
Author(s):  
R. C. Paul ◽  
P. Kapoor ◽  
. B. Baidya ◽  
R. Kapoor
Keyword(s):  
Formic Acid ◽  
Spectral Data ◽  
Magnetic Moment ◽  
Title Compound ◽  
Temperature Range ◽  
Infrared Spectral ◽  
Anhydrous Formic Acid

Abstract Chromium(III) Chloride, Basic Chromium(III) Formate, IR, Thermogravimetry, Magnetic Moment Chromium(III) chloride reacts with anhydrous formic acid to give basic chromium(III) formate [Cr3O(OOCH)6(H2O)2(HCOOH)](OOCH), HCOOH. Its reactions with bases (B) give compounds of the general composition [Cr30(C00CH)6(B)3](00CH). The title compound has been characterized by infrared spectral data, temperature range (266-110K) magnetic moment and thermogravimetry.

THE ACTION OF ANHYDROUS ACIDS ON ATP:CREATINE PHOSPHOTRANSFERASE

1962 ◽  
Vol 40 (5) ◽  
pp. 1018-1022 ◽  
Author(s):  
Florante A. Quiocho ◽  
Felix Friedberg
Keyword(s):  
Amino Acids ◽  
Phosphoric Acid ◽  
Formic Acid ◽  
Sulphuric Acid ◽  
Acyl Migration ◽  
Peptide Bonds ◽  
Hydrolysis Of ◽  
Anhydrous Formic Acid

Treatment of ATP:creatine phosphotransferase with anhydrous sulphuric acid permits transposition of 24% of the threonine residues and 69% of the serine residues. Treatment with anhydrous phosphoric acid yields similar results: 41% of the threonine residues and 60% of the serine residues are rearranged. Anhydrous formic acid does not induce an N- to O-acyl migration in the protein.Non-specific hydrolysis of peptide bonds or destruction of certain amino acids that might have occurred simultaneously with rearrangement during the anhydrous sulphuric or anhydrous phosphoric acid appears to be very slight. When the protein is treated with anhydrous sulphuric acid, however, phenylalanine "disappears" almost completely from the chromatogram.

REARRANGEMENT STUDIES WITH C14: V. THE SOLVOLYSIS OF 2-PHENYLETHYL-1-C14p-TOLUENESULPHONATE

1957 ◽  
Vol 35 (12) ◽  
pp. 1417-1422 ◽  
Author(s):  
C. C. Lee ◽  
G. P. Slater ◽  
J. W. T. Spinks
Keyword(s):  
Acetic Acid ◽  
Formic Acid ◽  
Glacial Acetic Acid ◽  
Ion Pair ◽  
Absolute Ethanol ◽  
Solvent Systems ◽  
Anhydrous Formic Acid

The solvolysis of 2-phenylethyl-1-C14p-toluenesulphonate in absolute ethanol, glacial acetic acid, 90% formic acid, and anhydrous formic acid gave rise to products which showed rearrangements of the C14-labeled atoms from the C-1 to the C-2 positions to the extent of 0.3%, 5.5%, 40%, and 45%, respectively. The results constitute an unequivocal proof that phenyl participation occurs in the reactions studied. The different degrees of rearrangement found for the different solvent systems are in agreement with the concept that the solvolysis process may have a range of mechanisms between the two extremes of the nucleophilic or SN2 type and the limiting or SN1 type. In the solvolysis in absolute ethanol, a small amount of "unreacted" 2-phenylethyl p-toluenesulphonate recovered from the reaction mixture was found to show isotope position rearrangement of almost the same degree as the ethanolysis product. This finding is tentatively attributed to the phenomenon of internal return involving an ethyl-phenonium p-toluenesulphonate ion-pair.

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