Purification of Acetonitrile as a Solvent for Exact Measurements.

Coetzee, J. F.; Cunningham, Glenn P.; McGuire, D. K.; Padmanabhan, G. R.

doi:10.1021/ac60189a034

Cited by 200 publications

(47 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Electrochemical measurements were carried out in acetonitrile, purified as in 1. c. 6 . Other experimental details have been reported previously 3 .…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Behaviour of the Fe(CO)₃NO^⊖ Ion

Murgia

Paliani

Cardaci

1972

Zeitschrift Für Naturforschung B

View full text Add to dashboard Cite

The Polarographie behaviour of [ (C2H5)4N] ® [Fe(CO)3NO] e has been investigated at the mercury dropping electrode and platinum stationary electrode.It was found that the complex displays two anodic and one cathodic waves. On the basis of the results obtained a mechanism is proposed and discussed.Polarographic studies have been carried out recently on several carbonyl 1 and carhonyl-nitrosyl 2 complexes with the aim of obtaining information on the electronic structure of the M -CO and M -NO bonds.In the reduction of carbonyl complexes the electronic change is localized on a prevailing central metal orbital. In the nitrosyl complexes, however, it is the JTNO 2 orbital which is involved in the reduction process, apart from some cases in which the presence of cr-allylic ligands completely modifies the reduction mechanism giving rise to the cleavage of the M-allyl 'bond 3 . This paper reports results on the Fe(CO)3NO e ion, with the aim of comparing its polarographic behaviour with that of the isoelectronic Co(CO)4 e ion 4 and to find out if in this ionic nitrosyl carbonyl complex it is still the orbital which is involved in reduction. Experimental[Et4N][Fe(CO)3NO] and Hg[Fe(CO)3NO]2 were prepared and purified as in the literature 5 . Since compounds were very sensitive to oxygen, they were handled in an argon atmosphere.Electrochemical measurements were carried out in acetonitrile, purified as in 1. c. 6 . Other experimental details have been reported previously 3 . Results and DiscussionThe complex [Et4N] ® [Fe(CO) 3NO] e shows two anodic waves and one cathodic wave at the dropping mercury electrode (Fig. 1).The two anodic waves, at -0.067 and + 0.63 V (for a depolarizer concentration of 2-10 _3 m) have Request for reprints should be sent to Dr. S. M. MURGIA,

show abstract

“…Electrochemical measurements were carried out in acetonitrile, purified as in 1. c. 6 . Other experimental details have been reported previously 3 .…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Behaviour of the Fe(CO)₃NO^⊖ Ion

Murgia

Paliani

Cardaci

1972

Zeitschrift Für Naturforschung B

View full text Add to dashboard Cite

show abstract

“…TEAP was recrystallized twice from doubly distilled water and dried at 60 "C in a vacuum oven for 2 days. The accessible range on Pt in 0.05 M TEAP ( + 2.7 to -2.1 V vs. Ag/AgC1/0.1 M TEAP in AN//) was better than that obtained by either of the previous techniques (8,9), indicating little or no water contamination from either the solvent or the salt.…”

Section: Methodsmentioning

confidence: 68%

“…The solvent purification procedure was based on two previously described techniques (8,9). Anhydrous Na,CO, (20 g) and KMnO, (30 g) were added to 2 1 of practical grade acetonitrile in a 3 1 flask.…”

Section: Methodsmentioning

confidence: 99%

The Electroreduction of Substituted Benzofurazans

Fawcett¹,

Forte²,

Loutfy³

et al. 1972

Can. J. Chem.

View full text Add to dashboard Cite

The electroreduction of 4-and 5-substituted benzofurazans was investigated at a platinum electrode in acetonitrile. Standard potentials for the reactions were linearly related to the energy of the lowest vacant molecular orbital as estimated by Hiickel theory. Standard rate constants for electron transfer decreased as standard potentials in the series became more cathodic. This decrease is attributed to a double layer effect. No correlation was obtained between standard rate constants and observed hyperfine splitting constants for the anion radicals.L'electrortduction des benzofurannes substituts en -4 et -5 a &ti. ttudite dans I'aci.tonitrile au moyen d'une tlectrode en platine. Les potentiels standard pour les rkactions ont &ti. relies d'une faqon lintaire aux orbitales moleculaires vacantes les plus basses telles qu'estimtes par la thtorie d'Hiickel. Les constantes de vitesse standard pour le transfert d'~1ectrons dkcroissent au fur et a mesure que les potentiels standard dans les series deviennent plus cathodiques. Cette diminution est attribuke A un effet de double couche. Aucune corrtlation n'a ete obtenue entre les constantes de vitesse standard et les constantes hyperfines de dtdoublement observtes pour les radicaux anioniques.

show abstract

“…Purification procedures for acetonitrile (14) and methanol (11) are described elsewhere. Simple 1:1 salts of the N-oxides with perchloric acid were obtained by a modified Szafran's procedure.…”

Section: Methodsmentioning

confidence: 99%