(209Bi) Bismuth NMR

Safety note: Some of the materials mentioned here are very dangerous. Ask a qualified chemist for advice before handling them. Qualified chemists should check the relevant safety literature before handling or giving advice about unfamiliar substances. NMR solvents are toxic and most are flammable. Specifically, bismuth salts are toxic in large quantities besides any toxicity arising from the anion. 209Bi is very slightly radioactive but not to an extent that it can be dangerous.

209Bi NMR

Bismuth (Bi) has one high sensitivity NMR active nucleus, 209Bi (fig. 1). It is quadrupolar and yields very broad signals even in the most symmetric of environments over a very wide chemical shift range. Only Bi3+ and [BiF6]- have been observed by high resolution NMR so chemical shift information (fig. 2) is very limited.

Fig. 1. 209Bi-NMR spectrum of Bi(NO3)3 in nitric acid/D2O

Bismuth spectrum

Fig. 2. Chemical shift ranges for bismuth NMR

Chemical shifts of bismuth

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Properties of 209Bi

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PropertyValue
Spin9/2
Natural abundance100%
Chemical shift range3300 ppm, from 0 to -3300
Frequency ratio (Ξ)16.069288%
Reference compoundsat. Bi(NO3)3 in conc. HNO3 + 50% D2O
Linewidth of reference2978 Hz
T1 of reference0.000052 s
Receptivity rel. to 1H at natural abundance0.144
Receptivity rel. to 1H when enriched0.144
Receptivity rel. to 13C at natural abundance848
Receptivity rel. to 13C when enriched848
Linewidth parameter200 fm4

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References

  1. K. Morgan, B. G. Sayer, G. J. Schrobilgen, "Bismuth NMR spectroscopy: 209Bi and 19F high-resolution NMR spectra of the hexafluorobismuthate(V) Ion", J. Magn. Reson., 1, 139-142 (1969).

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