The two species (i.e., iodobenzene derivative 1and salts 2a–d) and three component (i.e.,1 , the cation, and the anion from salts 2a )

June 06, 2024

• Title:       

  The two species (i.e., iodobenzene derivative 1and salts 2a–d) and three component (i.e.,1 , the cation, and the anion from salts 2a ) 

• Image Source:

  Connectivity and topology invariance in self-assembled and halogen-bonded anionic (6,3)-networks

• Mark:

  Scheme 1

• Associated context:

  It is required that cations fit in the cavity encircled by the hexagonal frames of the nets and the upper metric limit for the onium cation,  enabling the I···I− supramolecular synthon to form (6,3) networks that lie between the dimensions of tetra-n-propyl- and tetra-n-butylammonium cations. For instance, the self-assembly of 1 with Et4N+I−  or Et4P+I−  (2a,b) affords co-crystals 3a,b where both 1 and the iodide ions are tritopic and form (6,3)  networks where the two modules alternate at the network nodes (Scheme 1); the same happens with  n-Pr4N+I− but not with n-Bu4N+I−.