Effect of methylene versus ethylene linkers on structural properties of tert-butyl and mesityl bis(imidazolium) bromide salts
Abstract
The crystal structures of ligand precursor bis(imidazolium) salts 1,1′-methylenebis(3-tert-butylimidazolium) dibromide monohydrate, C15H26N4 +·2Br−·H2O or [ tBuNHC2Me][Br]2·H2O, 1,1′-(ethane-1,2-diyl)bis(3-tert-butylimidazolium) dibromide dihydrate, C16H28N4 +·2Br−·2H2O or [ tBuNHC2Et][Br]2·2H2O, 1,1′-methylenebis[3-(2,4,6-trimethylphenyl)imidazolium] dibromide dihydrate, C25H30N4 2+·2Br−·2H2O or [MesNHC2Me][Br]2·2H2O, and 1,1′-(ethane-1,2-diyl)bis[3-(2,4,6-trimethylphenyl)imidazolium] dibromide tetrahydrate, C26H32N4 2+·2Br−·4H2O or [MesNHC2Et][Br]2·4H2O, are reported. At 293 K, [ tBuNHC2Me][Br]2·H2O crystallizes in the P21/c space group, while [ tBuNHC2Et][Br]2·2H2O crystallizes in the P21/n space group at 100 K. At 112 K, [MesNHC2Me][Br]2·2H2O crystallizes in the orthorhombic space group Pccn while [MesNHC2Et][Br]2·4H2O crystallizes in the P21/c space group at 100 K. Bond distances and angles within the imidazolium rings are generally comparable among the four structures. All four bis(imidazolium) salts co-crystallize with one to four molecules of water.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 16, 2022
- Source ID
- 10.1107/s2056989022008003
Entities
People
- Adrian Torres
- Briana C. Arreaga
- Deandrea Dolberry
- E.M. Olivas
- Emily S. Thompson
- Hector L. Alarcon
- Jacob P. Brannon
- S Chantal E Stieber
Organizations
- National Institute of General Medical Sciences
- National Science Foundation Directorate for Education and Human Resources
- National Science Foundation Directorate for Mathematical & Physical Sciences
- United States Army