First Observation of Defined Structural Motifs in the Sulfur-Iodine Thermochemical Cycle and Their Role in Hydrogen Production

<table>Optimized geometries of the working models 4w<svg height="7.8625002" id="M61" style="vertical-align:-3.27605pt" version="1.1" viewbox="0 0 7.6374998 7.8625002" width="7.6374998" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.012,-0,0,-.012,2.9,7.8)"><path d="M303 0h-265v28q62 5 76 19.5t14 77.5v400q0 63 -14 77.5t-76 19.5v28h265v-28q-62 -5 -76 -19.5t-14 -77.5v-400q0 -64 14 -78t76 -19v-28z" id="x49"></path></g>
</svg> and 3w<svg height="7.8625002" id="M62" style="vertical-align:-3.27605pt" version="1.1" viewbox="0 0 7.6374998 7.8625002" width="7.6374998" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.012,-0,0,-.012,2.9,7.8)"><path d="M303 0h-265v28q62 5 76 19.5t14 77.5v400q0 63 -14 77.5t-76 19.5v28h265v-28q-62 -5 -76 -19.5t-14 -77.5v-400q0 -64 14 -78t76 -19v-28z" id="x49"></path></g>
</svg>. Water molecules within the complexes are labelled to ease description of the vibrational modes.</table>

International Journal of Spectroscopy

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Figure 4

Figure 4: First Observation of Defined Structural Motifs in the Sulfur-Iodine Thermochemical Cycle and Their Role in Hydrogen Production 