Results 11 to 20 of about 26,403 (237)
Activation of a Metal‐Halogen Bond by Halogen Bonding [PDF]
Angewandte Chemie - International Edition, 2020 Abstract In recent years, the non‐covalent interaction of halogen bonding (XB) has found increasing application in organocatalysis. However, reports of the activation of metal‐ligand bonds by XB have so far been limited to a few reactions with elemental iodine or bromine. Herein, we present the activation of metal‐halogen bonds by two
Claude Legault +2 more
exaly +7 more sources
“Anti-Electrostatic” Halogen Bonding [PDF]
Angewandte Chemie International Edition, 2020 Halogen bonding (XB) is often described as being driven predominantly by electrostatics, and thus adducts between anionic XB donors (halogen-based Lewis acids) and anions seem counterintuitive.
Jana M. Holthoff +3 more
openaire +3 more sources
Molecules, 2021 The formation of a pair of extended networks sustained by halogen bonds based upon two regioisomers of a photoproduct, namely rctt-1,3-bis(4-pyridyl)-2,4-bis(phenyl)cyclobutane (ht-PP) and rctt-1,2-bis(4-pyridyl)-3,4-bis(phenyl)cyclobutane (hh-PP), that ...
Taylor J. Dunning +3 more
doaj +1 more source
Astatine Facing Janus: Halogen Bonding vs. Charge-Shift Bonding
Molecules, 2021 The nature of halogen-bond interactions was scrutinized from the perspective of astatine, potentially the strongest halogen-bond donor atom. In addition to its remarkable electronic properties (e.g., its higher aromaticity compared to benzene), C6At6 can
Serigne Sarr +4 more
doaj +1 more source
Type II halogen···halogen contacts are halogen bonds [PDF]
IUCrJ, 2013 Cl/Br/I alternative substitutions in a series of dihalophenols indicate that type I and type II halogen···halogen contacts have different chemical nature. Only the latter ones qualify as true halogen bonds, according to the recent IUPAC definition.
METRANGOLO, PIERANGELO +1 more
openaire +4 more sources
Molecules, 2020 Periodic local vibrational modes were calculated with the rev-vdW-DF2 density functional to quantify the intrinsic strength of the X-I⋯OA-type halogen bonding (X = I or Cl; OA: carbonyl, ether and N-oxide groups) in 32 model systems originating from 20 ...
Yunwen Tao +5 more
doaj +1 more source
1,3,5-Trifluoro-2,4,6-triiodobenzene–piperazine (2/1)
IUCrData, 2021 The single-crystal structure of the title compound, C4H10N2·2C6F3I3, features a moderately strong halogen bond between one of the three crystallographically distinct iodine atoms and the nitrogen atom.
Christelle Hajjar +2 more
doaj +1 more source
Cooperativity of halogen bonds – enhancing halogen-bond donating ability of halogenated pyridines through halogen bonding with N-haloimides [PDF]
Acta Crystallographica Section A Foundations and Advances, 2018 N-halogenated imides, common halogenating agents in organic synthesis, have recently been marked as extremely strong halogen donors. In previous studies we have demonstrated that N-halogenated succinimides form extremely short XBs with halogen bond energies between 20 and 60 kJ mol–1, depending on the pyridine basicity and the halogen atom. In light of
Stilinović, Vladimir, Cinčić, Dominik
openaire +2 more sources
Frontiers in Chemistry, 2020 The pnicogen, chalcogen, and halogen bonds between 6-OXF2-fulvene (X = As, Sb, Se, Te, Br, and I) and three nitrogen-containing bases (FCN, HCN, and NH3) are compared.
Na Liu +2 more
doaj +1 more source
Molecules, 2020 The first example of a chiral halogen-bond donor with a sp3-hybridized carbon–iodine moiety in a fluorobissulfonyl scaffold is described. The binaphthyl backbone was designed as a chiral source and the chiral halogen-bond donor (R)-1 was synthesized from
Hiroto Uno +3 more
doaj +1 more source