The first slipped pseudo-quadruple-decker complex of phthalocyanines was formed unexpectedly upon treatmentof the protonated double-decker Sm
IIIH(Pc)[Pc(
-OC
4H
9)
8] with NaOH. The supramolecular structure contains twodouble-decker units linked by two sodium ions by an extremely rare coordination mode of phthalocyanines in whichan aza nitrogen atom and two oxygen atoms from neighboring alkoxy substituents form a tridentate ligand.