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Secondary hydrogen-bonding interactions have been exploited to construct layered magnetic solids based on amidinium–carboxylate salt bridges. The salt bridge is utilized as a supramolecular synthon to set the structural organization in a layered motif; it also serves as a spin communication element. The magnetic material shown in the accompanying figure is formed between 3-cyanobenzamidinium and 2,2,4,4-tetramethylpyrroline-N-oxyl-3-carboxylate.
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Papoutsakis et al. (1999) studied this question.
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