13C- and ’H-NMR chemical shift

The newly synthesized 5-5 bicyclic ring systems are mostly completely characterized using standard analytical techniques. Nevertheless, some 5-5 bicyclic ring systems are only sparsely characterized. Accordingly, 13C and H NMR chemical shifts are reported for most of these new compounds. Figure 2 shows the structures of the new compounds which are especially characterized by 13C NMR spectroscopy and other analytical methods. 

In order to characterize the alkali metal salts of the 11-vertex nido-dicarbaborates [C2B9H11]2- in solution, a series of salts were synthesized and studied by NMR spectroscopy and quantum mechanical calculations. Comparison of the theoretical nB, 13C, and H NMR chemical shifts of the isomeric dianions 7,8-, 7,9-, and [2,9-C2B9Hn]Z, and the ion pairs [ap-M-CzBgHn]- and MHP-MC2B9HH] with the observed data indicate that the alkali metal salts M2[C2B9Hn] exist in solution as anionic ion pairs [ap-M-C2B9Hn]- with the metal in apical position (ap) coordinated at the five-membered open face of the cluster.14... 

Table 7 13C and H NMR Chemical Shifts for 2,5-Disubstituted-A2-l,3,4-thiadiazoline Derivatives... 

TABLE 17. 13C- and H-NMR chemical shifts [<5XMS (ppm)] and, in brackets, coupling constants J (Hz) for compounds 326-330 in CDCl3a... 

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