Chapter 4 - Jacobs University

Chapter 9
Unpublished Results
Figure 9.5 Polyhedral/ball and stick type structural representation of 7. Color scheme Cu, P and WO 6
units are shown by turquoise, blue and red respectively.
9.1.2.2 Solution NMR
We also investigated the solution properties of 7a by 31 P NMR spectroscopy at room temperature
in D 2 O (400 MHz; JEOL ECX instrument). We observed a singlet at d = -29.6 ppm indicating
that all eight phosphorus atoms in 7a are equivalent, which is in complete agreement with the
solid-state structure (Figure 9.6). We have not yet obtained a good 183 W NMR spectrum for 7a
(expected are three signals of equal intensity), probably due to solubility problems.
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