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Key indicatorsSingle-crystal X-ray study T = 298 K Mean (C-C) = 0.002 Å R factor = 0.052 wR factor = 0.167 Data-to-parameter ratio = 16.0For details of how these key indicators were automatically derived from the article, see

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The reaction of 2,6-diacetylpyridine with 1,3-diamino-2-hydroxypropane in methanol in the presence of lead(ii) cations leads to the isolation of lead( 11) complexes of an oxazolidine-containing Schiff base macrocycle formed by ring-contraction; the ligand is hexadentate and the lead is N-bonded to one thiocyanate to form a mo noca t ion i c corn pl ex. The synthesis of ' 2 + 2' tetraimino-Schiff base macrocycles, pyridine-2,6-dicarbaldehyde, 2,6-diacetylpyridine, furan-23e.g. (l), from heterocyclic dialdehydes and diketones such as dicarbaldehyde and thiophene-2,5-dicarbaldehyde, and M , U -