Chapter 4 - Jacobs University

Crespo………………………………………………………………………………..41
Figure 3.1 FT-IR spectrum of 1a………………………………………………………………..61
Figure 3.2 Ball-and stick-representation of [Cu 20 Cl(OH) 24 (H2O) 12 (P 8 W 48 O 184 )] 25- (1). Black W,
turquoise Cu, yellow P, violet Cl, red O…………………………………………….65
Figure 3.3 Combined polyhedral/ball-and-stick representation of 1. The WO 6 octahedra are red
and the PO 4 tetrahedra are yellow. Otherwise, the labeling scheme is the same as that
in Figure 3.2…………………………………………………………………………65
Figure 3.4 Side view of 1 showing ball-and-stick (left) and combined polyhedral/ball-and-stick
(right) representations……………………………………………………………….66
Figure 3.5 Ball-and-stick representation of the asymmetric unit of 1, thermal ellipsoids shown
are set at 50% probability…………………………………………………………....67
Figure 3.6 Ball and stick representation of the copper-hydroxo cluster in 1 showing all
structurally equivalent copper atoms with the same label. Only the oxo-ligands
bridging neighboring copper ions are shown………………………………………..68
Figure 3.7 31 P NMR of 1a in H 2 O/D 2 O…………………………………………………………69
Figure 4.1 FTIR spectra of compounds 2a……………………………………………………...76
Figure 4.2 Thermogravimetric curve showing the loss of crystalline water molecules in complex
2a…………………………………………………………………………………….77
Figure 4.3 Front and side view of the structure of 2 emphasising the FeO 6 octahedra (brown) in
polyhedral representation. Colour code: W (green), O (red), P (pink)……………...81
Figure 4.4 Top: Combined polyhedral/ball-and-stick representation of 2 emphasizing the
connectivity of the central {Fe 16 (OH) 28 (H 2 O) 4 } 20+ cluster. Bottom: Ball-andstick
representation of the 16-iron-hydroxo cluster alone. Colour code: Fe
16