title: The diprotonated 2,2-(propane-1,3-diyl)bis(1,1,3,3-tetramethylguanidinium) cation: packing and conformational changes.
abstract: Subject to packing with different anions, the title cation undergoes various conformational changes with significantly different N-C-C-C torsion angles, as well as different angles between the NCN2 guanidine planes. The 2,2-(propane-1,3-diyl)bis(1,1,3,3-tetramethylguanidinium) salts reported here, viz. the dibromide, C13H32N6(2+).2Br-, the tetraphenylborate chloride, C13H32N62+.C24H20B-.Cl-, the tetrachloromercurate, (C13H32N6)[HgCl4], and the bis(trifluoromethanesulfonate), C13H32N6(2+).2CF3SO3-, are dominated by strong intermolecular N-H...X hydrogen bonds, which form different packing patterns.
authors.affiliation: Department Chemie, Fakultät für Naturwissenschaften, Universität Paderborn, Warburgerstrasse 100, D-33098 Paderborn, Germany. ulrich.floerke@upb.de
authors.forename: Ulrich
authors.initials: U
authors.lastname: Flörke
authors.forename: Sonja
authors.initials: S
authors.lastname: Herres-Pawlis
authors.forename: Andreas
authors.initials: A
authors.lastname: Heuwing
authors.forename: Adam
authors.initials: A
authors.lastname: Neuba
authors.forename: Oliver
authors.initials: O
authors.lastname: Seewald
authors.forename: Gerald
authors.initials: G
authors.lastname: Henkel