Chapter 4 - Jacobs University

Chapter 9
Unpublished Results
isomer. The BVS calculation suggests that the four oxygen atoms are monoprotonated. We
performed TGA measurements on 20a (Figure 9.52) from room temperature to 900 ° C which is
fully consistent with the formula of 20a provided above.
Figure 9.53 Polyhedral/ball and stick type structural representation of 20. Color scheme: Zr, As, C and WO 6 units
are shown by deep green, yellow, blue, red and light green respectively.
9.3.1.2 Solution NMR
To complement our solid state XRD results on 20 with solution studies, we performed room
temperature 1 H and 13 C NMR on 20a redissolved in H 2 O/D 2 O. The 1 H NMR (Figure 9.54)
spectrum exhibits one signal at 1.70 ppm, and the 13 C NMR (Figure 9.55) spectrum exhibits two
signals 24.14 and 182.03 ppm which are fully consistent with the solid state structure.
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