Abstract
Crystal structure determinations of the compounds (C4H4Br2N2)+[I3]−, 1, and (C5H5BrN)+[IBr2]−, 2, have been carried out. In 1, the anion is surrounded symmetrically by four cations. This arrangement results from both (π)N‒H · · · I‒I‒I and I‒I‒I · · · Br‒C(π) intermolecular interactions, tying the cations and anion into sheets of pseudo four fold arrays of cations and anions. The crystal lattice of 2 consists of stacks of cations and anions that are connected via C‒Br · · · Br‒I‒Br, N‒H · · · Br‒I‒Br, and Br‒I‒Br · · · IBr2 inter-stacks intermolecular interactions leading to a supramolecular assembled lattice. The IBr2 − anions are also assembled in a nearly T-shaped dimeric motif where one bromide end is interacting with the central iodide atom in another IBr2 − unit (I‒Br · · · I angle of 154°). The extensive anion · · · cation intermolecular interactions in both compounds lead to a crystal supramolecularity.
Acknowledgements
The Bruker (Siemens) SMART APEX diffraction facility was established at the University of Idaho with the assistance of the NSF-EPSCoR program and the M. J. Murdock Charitable Trust, Vancouver, WA, USA. Financial support from Al al-Bayt University and Al-Balqa′a Applied University is greatly appreciated.