title: Very strong (-)N-X(+)(-)O-N(+) halogen bonds.
abstract: A new (-)N-X(+)(-)O-N(+) paradigm for halogen bonding is established by using an oxygen atom as an unusual halogen bond acceptor. The strategy yielded extremely strong halogen bonded complexes with very high association constants characterized in either CDCl3 or acetone-d6 solution by (1)H NMR titrations and in the solid-state by single crystal X-ray analysis. The obtained halogen bond interactions, RXB, in the solid-state are found to be in the order of strong hydrogen bonds, viz. RXB ≈ RHB.
authors.affiliation: University of Jyvaskyla, Department of Chemistry, Nanoscience Center, P.O. Box. 35, FI-40014 University of Jyvaskyla, Finland. kari.t.rissanen@jyu.fi.
authors.forename: Rakesh
authors.initials: R
authors.lastname: Puttreddy
authors.affiliation: University of Jyvaskyla, Department of Chemistry, Nanoscience Center, P.O. Box. 35, FI-40014 University of Jyvaskyla, Finland. kari.t.rissanen@jyu.fi.
authors.forename: Ondřej
authors.initials: O
authors.lastname: Jurček
authors.affiliation: University of Jyvaskyla, Department of Chemistry, Nanoscience Center, P.O. Box. 35, FI-40014 University of Jyvaskyla, Finland. kari.t.rissanen@jyu.fi.
authors.forename: Sandip
authors.initials: S
authors.lastname: Bhowmik
authors.affiliation: University of Jyvaskyla, Department of Chemistry, Nanoscience Center, P.O. Box. 35, FI-40014 University of Jyvaskyla, Finland. kari.t.rissanen@jyu.fi.
authors.forename: Toni
authors.initials: T
authors.lastname: Mäkelä
authors.affiliation: University of Jyvaskyla, Department of Chemistry, Nanoscience Center, P.O. Box. 35, FI-40014 University of Jyvaskyla, Finland. kari.t.rissanen@jyu.fi.
authors.forename: Kari
authors.initials: K
authors.lastname: Rissanen