(15‐crown‐5)BiI₃ as a Building Block for Halogen Bonded Supramolecular Aggregates

Abstract

We present the synthesis and characterization of (15-crown-5) BiI 3 (1) and (15-crown-5)BiI 3 • 0.5TIE (2), a halogen bonded adduct with tetraiodoethylene (TIE), a typical halogen bond donor. Single crystal structure analysis of 2 suggests a halogen bonding interaction between crown ether complex and TIE. The two compounds' thermal, optical and vibrational properties are investigated in comparison, with differences pointing towards a notable interaction between the two building blocks in 2. Our results show that crown ether complexes of main group metal halides can be employed as halogen bond acceptors for the synthesis of new supramolecular aggregates.

Definition of the Pnictogen Bond: A Perspective

“…The attractive interaction between As, Sb, or Bi containing chemical systems (not all, but many) and O in water, carboxylic acids, aldehydes, nitrates, and ketones, etc., is a pnictogen bond, not a chalcogen bond (for example, the As [83]. The attractive intermolecular interaction between the Bi or Sb of bismuth or antimony trihalides and the O sites in crown ether derivatives is a pnictogen bond [84][85][86][87][88]. The attractive intramolecular interaction between antimony and chlorine in crystalline dichloro-triphenyl-antimony-trichloro-antimony (CSD ref: BUMGEV) [89] is not a halogen bond, it is a pnictogen bond.…”