Thermal dehydration promotes the topochemical conversion of the hydrogen-bonded dimeric complex [{Zn(sala)(H2O)2}2]⋅2 H2O (H2(sala)=N-(2-hydroxybenzyl)-L-alanine) to generate covalent [{Zn(sala)}n]. X-ray crystallography reveals that hydrogen bonding plays a key role in this process (see the partial structure on the right).
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Ranford et al. (1998) studied this question.