Polarographische Untersuchungen in wasserfreiem Äthylendiamin

Schöber, G.; Gutmann, V.

doi:10.1007/bf00901627

Cited by 25 publications

(9 citation statements)

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“…The reduction of these compounds proceed in the same manner as those of compounds (1a±c). Going from DCE to DMSO (increasing the donor number from 0.1 to 29.8) [26], the reduction becomes more dif®cult while the oxidation becomes easier which is in full agreement with the well-known solvation effect [26±28]. Figures 7 and 8 represents the relationship between D E 1=2 of the two series of compounds 1a and 2a and the donor number of the solvents.…”

Section: Substituent Effectsupporting

confidence: 75%

Voltammetric Studies on Some Azoles and Their Derivatives

2001

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The redox characteristics of three series namely 5‐phenylmethylene‐2‐phenylhydrazonothiazolidin‐4‐ones, 3‐phenyl‐8‐oxobenzylidenthiazoles‐(2,3‐c)triazoles and ethyl‐2‐phenylhydrazono‐2‐benzimidazol‐2‐ylacetate has been investigated in nonaqueous acetonitrile, 1,2‐dichloroethane, tetrahydrofuran and dimethylsulfoxide at platinium and gold electrodes. Through controlled potential electrolysis, the oxidation and reduction products of each class of compounds can be separated and identified. The redox mechanism is suggested and proved.

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Section: Substituent Effectsupporting

confidence: 75%

Voltammetric Studies on Some Azoles and Their Derivatives

2001

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“…A more commonly used scale involving synthetically relevant Lewis acids is the donicity number (DN) scale developed by Gutmann et al [24,44] This scale is based on two experimental techniques, depending on the identity of the Lewis acid: the measured enthalpy of adduct formation between SbCl 5 and a Lewis base in a dilute solution of 1,2dichloroethane, and the chemical shift of the 23 Na NMR signal of the adduct formed between a Lewis base and NaClO 4 . Although this scale has been widely used because of its reference to synthetically relevant Lewis acids, it has been widely criticized for several reasons.…”

Section: Toward a Scale Of Lewis Basicity: Identity Of The Lewis Basementioning

confidence: 99%

“…Several other Lewis acid specific scales have been developed by using such techniques as calorimetry, [44][45][46] NMR spectroscopy, [48] and ion cyclotron resonance (ICR) spectroscopy. [49] Although most of these scales are limited, they are still in rough agreement with the scales discussed above.…”

Section: Toward a Scale Of Lewis Basicity: Identity Of The Lewis Basementioning

confidence: 99%

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Lewis Base Catalysis in Organic Synthesis

2008

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The legacy of Gilbert Newton Lewis (1875-1946) pervades the lexicon of chemical bonding and reactivity. The power of his concept of donor-acceptor bonding is evident in the eponymous foundations of electron-pair acceptors (Lewis acids) and donors (Lewis bases). Lewis recognized that acids are not restricted to those substances that contain hydrogen (Brønsted acids), and helped overthrow the "modern cult of the proton". His discovery ushered in the use of Lewis acids as reagents and catalysts for organic reactions. However, in recent years, the recognition that Lewis bases can also serve in this capacity has grown enormously. Most importantly, it has become increasingly apparent that the behavior of Lewis bases as agents for promoting chemical reactions is not merely as an electronic complement of the cognate Lewis acids: in fact Lewis bases are capable of enhancing both the electrophilic and nucleophilic character of molecules to which they are bound. This diversity of behavior leads to a remarkable versatility for the catalysis of reactions by Lewis bases.

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“…57 A study of rate of anodic migration of iron for the equimolar complex of iron(III) chloride with benzoyl chloride in nitromethane and iron(III) chloride in excess of benzoyl chloride as solvent show the that whole of iron is in the anionic state which supports the ionization of the complex as C 6 H 5 C O + F e C l 4 -. Some irregularities have been observed in the polarographic curves and have been attributed to the interaction of solvent with mercury.…”

Section: Miscellaneousmentioning

confidence: 92%