THE SULFURIC ACID SOLVENT SYSTEM: PART VIII. SOLUTIONS OF SOME PHOSPHORUS(V) AND VANADIUM(V) COMPOUNDS

1966 ◽  
Vol 44 (10) ◽  
pp. 1203-1210 ◽  
Author(s):  
R. J. Gillespie ◽  
R. Kapoor ◽  
E. A. Robinson
Keyword(s):  
Sulfuric Acid ◽  
Vanadium Pentoxide ◽  
Phosphorus Oxychloride ◽  
Solvent System ◽  
Triethyl Phosphate ◽  
Triphenyl Phosphine ◽  
System Part

It is shown that a number of phosphates ionize in sulfuric acid to give the P(OH)4+ ion. Triphenyl phosphine and triethyl phosphate are fully protonated but phosphorus oxyfluoride and phosphorus oxychloride are shown to be nonelectrolytes.Ammonium metavanadate and vanadium pentoxide give the acid H[VO(HSO4)4] and there is evidence that the dimer H[V2O3(HSO4)6] and possibly higher polymers are present in increasing amounts with increasing concentration.

THE SULFURIC ACID SOLVENT SYSTEM: PART VII. SOLUTIONS OF SOME TIN(IV) AND LEAD(IV) COMPOUNDS

1966 ◽  
Vol 44 (10) ◽  
pp. 1197-1202 ◽  
Author(s):  
R. J. Gillespie ◽  
R. Kapoor ◽  
E. A. Robinson
Keyword(s):  
Sulfuric Acid ◽  
Sulfonic Acid ◽  
Solvent System ◽  
Lead Tetraacetate ◽  
Benzene Sulfonic Acid ◽  
Tin Compounds ◽  
Cationic Species ◽  
Stannic Acid ◽  
System Part

Solutions of tetramethyl tin trimethyl tin sulfate, di-n-butyl tin diacetate, tetraphenyl tin, and triphenyl tin hydroxide in. 100% sulfuric acid have been investigated by cryoscopic and conductimetric methods. Tetramethyl tin reacts with sulfuric acid with the evolution of methane and the formation of trimethyl tin hydrogensulfate. Trialkyl tin hydrogensulfates and dialkyl tin dihydrogensulfates behave as strong bases. It is probable that the cationic species formed are protonated hydrogensulfates rather than "stannonium" ions. Phenyl-substituted tin compounds are cleaved in sulfuric acid with the formation of benzene sulfonic acid and the complex hexa(hydrogensulfato) stannic acid, H2Sn(HSO4)6, and its anions. Lead tetraacetate gives yellow solutions containing hexa(hydrogensulfato) plumbic acid, H2PB(HSO4O6, and its anions.

The trifluoroacetic acid solvent system. Part V. Cryoscopic measurements

1976 ◽  
Vol 54 (19) ◽  
pp. 3031-3037 ◽  
Author(s):  
Michael G. Harriss ◽  
John B. Milne
Keyword(s):  
Trifluoroacetic Acid ◽  
Dissociation Constants ◽  
Freezing Point ◽  
Solvent System ◽  
Ion Pair ◽  
Conductivity Measurements ◽  
Cast Doubt ◽  
System Part ◽  
Triple Ions ◽  
Cryoscopic Constant

Measurement of freezing point depressions for the non-electrolytes, CCl4. CH3SO2F, and (CF3CO)2O permit calculation of the cryoscopic constant for trifluoroacetic acid, HOTFA. Water is shown to give freezing point depressions lower than those for non-electrolytes and this is attributed to association. Freezing point depressions for NaOTFA, KOTFA, and CsOTFA have been measured and accounted for in terms of ion-pair dissociation constants previously determined from electrical conductivity measurements. The results cast doubt on the existence of triple ions in this solvent.

286. The liquid dinitrogen tetroxide solvent system. Part III. The electrical conductivity of liquid dinitrogen tetroxide

1951 ◽  
pp. 1289 ◽  
Author(s):  
C. C. Addison ◽  
J. Allen ◽  
H. C. Bolton ◽  
J. Lewis
Keyword(s):  
Electrical Conductivity ◽  
Solvent System ◽  
Dinitrogen Tetroxide ◽  
System Part
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