Calix[4]bis(thiacrown): Assembly of an Endocyclic Disilver(I) Complex and Exocyclic 3D Copper(I) Coordination Polymers

Calix[4]bis(thiacrown-5) (L) with 1,3-alternating conformation was
employed as a strong dinucleating ligand for the soft metal ions
AgI and CuI. The reaction of L with AgPF6 afforded a discrete
endo-coordinated disilver(I) complex 1, [Ag2L](PF6)2. In contrast,
mixed products (2a + 2b) consisting of 3D networks were obtained
from the reaction of L and CuI; 2b linked with a Cu4I4 cubane unit
was shown to generate photoluminescence, while 2a linked with
a Cu2I2 rhomboid unit does not.