Hydrogen-1 NMR rate constants and mercury-199 FT NMR equilibrium constants involved in disulfide cleavage by methylmercury

Bach, Robert D.; Rajan, Sundar J.; Vardhan, Harsha; Lang, T. J.; Albrecht, Norman G.

doi:10.1021/ja00416a006

Cited by 42 publications

(6 citation statements)

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“…[22][23][24][25][26] which has a rotational correlation time greater than lop9 s, it may be difficult to observe the 199Hg resonance because of its large line-width (v,,, = 335 Hz for Ao = 6000ppm). Secondly, the scalar coupled 199Hg satellites (doublet) generally observed in the nmr spectrum of a slowly relaxing nucleus, X, will be significantly broadened.…”

Section: Methodsmentioning

confidence: 99%

Mercury-199 nuclear magnetic resonance relaxation in some mercury(II) compounds

Wasylishen¹,

Lenkinski²,

Rodger³

1982

Can. J. Chem.

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. Can. J. Chem. 60, 2113Chem. 60, (1982. Mercury-199 spin-lattice relaxation times are reported for several mercury(I1) compounds at 5.875 and 9.40T. From the field dependence of TI in Hg(CN),, Hg(CH,),, and Hg(C6H5),, 199Hg chemical shielding anisotropies of 3800,5820, and 5800ppm are calculated. The errors in these of estimates of Ao are at least 10%. Some implications of the large A c~( l~~H g ) values in high field nmr studies are discussed. RODERICK E. WASYLISHEN, ROBERT E. LENKINSKI et CHARLES RODGER. Can. J. Chem. 60,2113Chem. 60, (1982. On rapporte les temps de relaxation spin-rCseau du mercure-199 dans plusieurs composCs du mercure(I1) a 5,875 et 9,40T. A partir de I'influence du champ sur TI dans les composCs Hg(CN),, Hg(CH,), et Hg(C6H5),, on a calculC les anisotropies de blindage chimique du '99Hg qui sont respectivement de 3800, 5820 et 5800ppm. Les erreurs dans ces Cvaluations sont au moins de 10%. On discute des quelques implications des grandes valeurs A c~( l~~H g ) dans les Ctudes de rmn a haut champ.[Traduit par le journal] Introduction While investigating the high field (B, = 9.40T) I3C nmr spectra of several organomercury(I1) compounds, we observed Ig9Hg satellites due to '99Hg-13C scalar coupling which were significantly broader than the central uncoupled 13C resonance. Of the naturally occurring mercury isotopes, only Ig9Hg (natural abundance 16.84%) has a spin I = 112. Although ,OIHg has I = 312, its large quadrupole moment generally leads to extremely efficient quadrupole relaxation for this nucleus, resulting in "self-decoupling" from any spin 112 nucleus such as 13C. In this paper we show that chemical shielding anisotropy relaxation is very efficient for Ig9Hg at applied fields of 9.40 T and that this mechanism can lead to significant lg9Hg line broadening, thus broadening Ig9Hg satellites in spectra of spin 112 nuclei which are scalar coupled to Ig9Hg. Values of the lg9Hg chemical shielding anisotropy, CSA, are estimated from lg9Hg TI values measured at applied fields of 5.875T and 9.40T and the imvlications of these

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Section: Methodsmentioning

confidence: 99%

Mercury-199 nuclear magnetic resonance relaxation in some mercury(II) compounds

Wasylishen¹,

Lenkinski²,

Rodger³

1982

Can. J. Chem.

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“…390 Mercurium captans ("seizing mercury") is the generic term for mercaptans. 391 The question is, why should the Hg-S bond be so strong? (The formation constant for CH3HgSR is 1014-1018.)…”

Section: Further Possible Examples and Open Problemsmentioning

confidence: 99%

Relativistic effects in structural chemistry

Pyykkö¹

1988

Chem. Rev.

2,857

1,928

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“…The optimization strategy also investigated the effect of mixing time, the number of successive extractions and the L-cysteine concentration. Mercury thiolates were used as model molecule for ionic Hg as Hg is easily exchanging thiolates groups in various situation [17,23]. As the Figure 6 shows, efficient conditions for the extraction step were seen with min of extraction for 3 successive extractions with a 1% w/w L-cysteine solution.…”

Section: Optimization and Improvement Of The Extraction Stepmentioning

confidence: 99%

Mercury speciation in liquid petroleum products: Comparison between on-site approach and lab measurement using size exclusion chromatography with high resolution inductively coupled plasma mass spectrometric detection (SEC-ICP-HR MS)

Gaulier

Gibert

Walls³

et al. 2015

Fuel Processing Technology

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Hydrogen-1 NMR rate constants and mercury-199 FT NMR equilibrium constants involved in disulfide cleavage by methylmercury

Cited by 42 publications

References 5 publications

Mercury-199 nuclear magnetic resonance relaxation in some mercury(II) compounds

Mercury-199 nuclear magnetic resonance relaxation in some mercury(II) compounds

Relativistic effects in structural chemistry

Mercury speciation in liquid petroleum products: Comparison between on-site approach and lab measurement using size exclusion chromatography with high resolution inductively coupled plasma mass spectrometric detection (SEC-ICP-HR MS)

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