Fourier Transform Nuclear Magnetic Resonance Studies of 25 Mg and 43 Ca
1975; De Gruyter; Volume: 30; Issue: 9 Linguagem: Inglês
10.1515/zna-1975-0903
ISSN1865-7109
AutoresO. Lutz, A. Schwenk, Alexandra Uhl,
Tópico(s)Molecular spectroscopy and chirality
ResumoThe ratios of the Larmor frequencies of 25 Mg and 37 Cl and of 43 Ca and 37 Cl have been measured in aqueous solutions and nuclear magnetic moments are given for these nuclei in the hydrated ions. 25 Mg and 43 Ca chemical shifts have been investigated at natural abundance of these isotopes in solutions of the chlorides, bromides, nitrates, Perchlorates in H 2 O and D 2 O. The signal intensities are large enough to study within reasonable time these nuclei at natural abundance down to low concentrated solutions, e.g. 8 millimolal for 25 Mg. For 25 Mg very small chemical shifts have been observed whereas for 43 Ca remarkable shifts to higher frequencies are found for halide solutions and to lower frequencies for the oxyanion solutions. Linewidths of only some Hz have been observed for both isotopes
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