title: The 1:1 co-crystal of triphen-yl(2,3,5,6-tetra-fluoro-benz-yl)phospho-nium bromide and 1,1,2,2-tetra-fluoro-1,2-di-iodo-ethane.
abstract: The title compound, C25H18F4P(+)·Br(-)·C2F4I2, is a 1:1 co-crystal of triphen-yl(2,3,5,6-tetra-fluoro-benz-yl)phospho-nium (TTPB) bromide and 1,1,2,2-tetra-fluoro-1,2-di-iodo-ethane (TFDIE). The crystal structure consists of a framework of TTPB cations held together by C-H⋯Br inter-actions. In this framework, infinite channels along [100] are filled by TFDIE mol-ecules held together in infinite ribbons by short F⋯F [2.863 (2)-2.901 (2)Å] inter-actions. The structure contains halogen bonds (XB) and hydrogen bonds (HB) in the bromide coordination sphere. TFDIE functions as a monodentate XB donor as only one I atom is linked to the Br(-) anion and forms a short and directional inter-action [I⋯Br(-) 3.1798 (7) Å and C-I⋯Br(-) 177.76 (5)°]. The coordination sphere of the bromide anion is completed by two short HBs of about 2.8 Å (for H⋯Br) with the acidic methyl-ene H atoms and two longer HBs of about 3.0 Å with H atoms of the phenyl rings. Surprisingly neither the second iodine atom of TFDIE nor the H atom on the tetra-fluoro-phenyl group make any short contacts.
authors: NFMLab, Department of Chemistry, Materials and Chemical Engineering, "Giulio Natta", Politecnico di Milano, Via Mancinelli, 7, I-20131 Milano, Italy.
authors: Gabriella
authors: G
authors: Cavallo
authors: NFMLab, Department of Chemistry, Materials and Chemical Engineering, "Giulio Natta", Politecnico di Milano, Via Mancinelli, 7, I-20131 Milano, Italy.
authors: Pierangelo
authors: P
authors: Metrangolo
authors: Laboratory of Biopolymers and Supramolecular Nanomaterials, Universitè Libre de Bruxelles (ULB), Campus de la Plaine, Boulevard du Triomphe, B-1050 Bruxelles, Belgium.
authors: Franck
authors: F
authors: Meyer
authors: NFMLab, Department of Chemistry, Materials and Chemical Engineering, "Giulio Natta", Politecnico di Milano, Via Mancinelli, 7, I-20131 Milano, Italy.
authors: Tullio
authors: T
authors: Pilati
authors: NFMLab, Department of Chemistry, Materials and Chemical Engineering, "Giulio Natta", Politecnico di Milano, Via Mancinelli, 7, I-20131 Milano, Italy.
authors: Giuseppe
authors: G
authors: Resnati
authors: NFMLab, Department of Chemistry, Materials and Chemical Engineering, "Giulio Natta", Politecnico di Milano, Via Mancinelli, 7, I-20131 Milano, Italy.
authors: Giancarlo
authors: G
authors: Terraneo