Nitrogen-14 nuclear magnetic resonance studies of acetonitrile exchange from the first coordination sphere of manganese(II)

W. L. Purcell, R. S. Marianelli

Research output: Contribution to journalArticle

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Abstract

The 14N nuclear relaxation times of acetonitrile (CH3CN) solutions of manganese(II) perchlorate have been studied as a function of temperature. Saturation studies have shown that a scalar coupling mechanism controls the relaxation of the 14N nucleus in the coordination sphere of the Mn(II) ion. A determination of the kinetic parameters for the exchange of CH3CN from the first coordination sphere of Mn(II) yielded a first-order rate constant, k1, at 25° of (1.2 ± 0.3) × 107 sec-1, a ΔH for exchange of 7.25 ± 0.25 kcal/mol, and a ΔS for exchange of -1.8 ± 0.8 eu. The value determined for the scalar coupling constant, A/h, was 3.2 × 106 Hz.

Original languageEnglish
Pages (from-to)1724-1728
Number of pages5
JournalInorganic Chemistry
Volume9
Issue number7
StatePublished - Dec 1 1970

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Manganese
acetonitrile
manganese
Nitrogen
Nuclear magnetic resonance
scalars
nitrogen
nuclear relaxation
nuclear magnetic resonance
perchlorates
Kinetic parameters
Relaxation time
Rate constants
relaxation time
Ions
saturation
nuclei
kinetics
ions
Temperature

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Nitrogen-14 nuclear magnetic resonance studies of acetonitrile exchange from the first coordination sphere of manganese(II). / Purcell, W. L.; Marianelli, R. S.

In: Inorganic Chemistry, Vol. 9, No. 7, 01.12.1970, p. 1724-1728.

Research output: Contribution to journalArticle

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