Some Structural Problems

Bulman RA (1978) Chemistry of Plutonium and the Transuranics in the Biosphere. 34 39-77 Bulman RA (1987) The Chemistry of Chelating Agents in Medical Sciences. 67 91-141 Burdett JK (1987) Some Structural Problems Examined Using the Method of Moments. 65 29-90... 

Burden, J. K. Some Structural Problems Examined Using the Method of Moments. Vol. 65, pp. 29-90. 

After a paper devoted to GIAO/B3LYP calculations of 13 monosubstituted benzenes and 21 1-substituted pyrazoles [148] that allowed discussion of some structural problems (such as conformation, tautomerism, and structure of salts) we have continued to use this combination of experimental (in solution and in the solid state, CPMAS NMR) and calculated values as a very useful exploratory technique. For instance, we have used II, 13C, and 15NNMR spectroscopy to study compounds 149-154. In para-disubstituted derivatives 149,151,152,153, in the solid state (no free rotation) the signals of the ortho carbons are split (one is close to N2) and, thanks to the calculated values, they can be assigned [149],... 

Very recent studies have examined the possibility of using 33S MAS spectroscopy in the study of some structural problems in cementitious materials107 108 and in sulphur speciation in silicate melts.109 Several processes of the deterioration of cements and more generally lapideous materials can be correlated to the stability of sulphate, to changes in the sulphate phase and to the interaction of sulphate ions with water molecules and hydrates.108 Since sulphate anion is one of the species that can be studied more easily by 33S NMR solid-state spectroscopy, this technique can be a valuable tool in studying... 

Some Structural Problems Examined Using the Method of Moments... 

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