Abstract
5-(4-[N-Tert-butyl-N-aminoxyl]phenyl)pyrimidine crystallographically exhibits alternating chains and in-plane dimers involving two distinct molecular geometries, plus dimeric stacking of only one of the forms. Its magnetic behavior is neither fully spin pairing nor chain-like, but rather shows low temperature spin pairing for half of molecules in the unit cell with J/k = (−)130 J/mol, consistent with dominating exchange behavior of the dimerically π-stacked form. The other molecules in the unit cell behave in an essentially paramagnetic manner.
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