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D The signals in the NMR spectra were identified on the basis of a change in 811B of the monomeric [ B ( OH ) 4 - m ... Signal K ( 8 9.26 ppm ) was assigned on the basis of a similar func- tion for the [ B2 ( OO ) 2 ( OH ) 4 – m ( OOH ) ...
D The signals in the NMR spectra were identified on the basis of a change in 811B of the monomeric [ B ( OH ) 4 - m ... Signal K ( 8 9.26 ppm ) was assigned on the basis of a similar func- tion for the [ B2 ( OO ) 2 ( OH ) 4 – m ( OOH ) ...
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The multiplicity of this signal could be explained by the F - H spin cou- pling ; however , the experiments with broadband 19F { H } decoupling demonstrated that this is not the case ( the multiplicity remained unaltered ) .
The multiplicity of this signal could be explained by the F - H spin cou- pling ; however , the experiments with broadband 19F { H } decoupling demonstrated that this is not the case ( the multiplicity remained unaltered ) .
Trang 1747
The 27Al NMR spectra of the Al ( NO3 ) 3 — H3nta – D2O solutions with nta : Al ~ 1 and pH 4 show two signals at 0.37 ... At the molar ratio nta : Al = 1.4 and pH 6 , the spectrum only shows a signal with a width of 440 Hz at 25.6 ppm .
The 27Al NMR spectra of the Al ( NO3 ) 3 — H3nta – D2O solutions with nta : Al ~ 1 and pH 4 show two signals at 0.37 ... At the molar ratio nta : Al = 1.4 and pH 6 , the spectrum only shows a signal with a width of 440 Hz at 25.6 ppm .
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