NUCLEAR MAGNETIC RESONANCE MEASUREMENTS OF PROTON EXCHANGE IN ALCOHOL–WATER SYSTEMS: PART II. n-C3H7OH–H2O AND i-C3H7OH–H2O

1963 ◽  
Vol 41 (10) ◽  
pp. 2472-2476 ◽  
Author(s):  
W. G. Paterson
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Exchange Reaction ◽  
Rate Constants ◽  
Water Systems ◽  
Proton Exchange ◽  
Methods Of Analysis ◽  
Alcohol Water ◽  
Line Widths ◽  
Nuclear Magnetic

Recent methods of analysis of exchange-broadened n.m.r. multiplets are used to make measurements of multiplet spacings and line widths in the n.m.r. spectra of n-C3H7OH–H2O and i-C3H7OH–H2O solutions. The data are interpreted in terms of the proton exchange reaction [Formula: see text](R = n-C3H7 and i-C3H7) for which rate constants k = 1.7 ± 0.3 (R = n-C3H7) and 0.35 ± 0.06 (R = i-C3H7) l. mole−1 sec−1 at 42 ± 1° are suggested. Possible exchange mechanisms are discussed.

NUCLEAR MAGNETIC RESONANCE MEASUREMENTS OF PROTON EXCHANGE IN ALCOHOL–WATER SYSTEMS: PART III. n-, i-, s-, AND t-C4H9OH–H2O

1963 ◽  
Vol 41 (10) ◽  
pp. 2477-2481 ◽  
Author(s):  
W. G. Paterson ◽  
H. Spedding
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Exchange Rates ◽  
Rate Constants ◽  
Water Systems ◽  
Proton Exchange ◽  
Alkyl Groups ◽  
Alcohol Water ◽  
Nuclear Magnetic

Measurements of exchange-broadened n.m.r. signals are analyzed by recent methods to yield proton exchange rates of the reaction [Formula: see text] where R = n-, i-, s-, and t-C4H9. The rate constants suggested are 0.95 (44°), 0.90 (42°), 0.60 (46°), and 0.25 (46°) l. mole−1 sec −1, respectively. The trend in rate constants for these four systems, and the C2H5OH–, n-C3H7OH–, and i-C3H7OH–H2O systems examined in Parts I and II (W. G. Paterson, Can. J. Chem. 41, 714, 2472 (1963)), is discussed in terms of the nature of the alkyl groups in each alcohol.

The exchange of acetonitrile on iron(II) in acetonitrile solvent. A nitrogen-14 nuclear magnetic resonance study

1971 ◽  
Vol 24 (6) ◽  
pp. 1169 ◽  
Author(s):  
RJ West ◽  
SF Lincoln
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Exchange Reaction ◽  
Nuclear Magnetic Resonance Study ◽  
Magnetic Resonance Study ◽  
Rate Law ◽  
Nuclear Magnetic

A 14N n.m.r. study of the exchange reaction Fe(CH3CN)62+ ╲ CH3CN in CH3CN solvent is reported. The value for k 1 (25°C) from the rate law R = 6k1[Fe(CH3CN)62+] is (5.5 ± 0.8) × 105 s-1, ΔH‡ = 9.7 ± 0.7 kcal mol-1, ΔS‡ = 0.3 ± 2.2 cal mol-1 K-1, and A/h = 5.0 × 106 Hz. These data are compared with those of related systems.

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