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1Author    Matthias Frey, PeterG. JonesRequires cookie*
 Title    Secondary Bonding Interactions in Some Halopyridinium and Dihalopyridinium Halides  
 Abstract    The packing motifs of 2-and 3-chloropyridinium chloride can be interpreted in terms of classical hydrogen bonds N+-H -C 1~ and non-classical C-H--C1" interactions, with halo-gen-halogen contacts playing a subordinate role. In the corresponding bromine derivatives, Br--Br interactions are much more important. Of the dihalo derivatives, 3,5-dichloropyridinium chloride crystallises with classical linear hydrogen bonds of the form N+-H -C1_ , but its chlorine-chlorine interactions are at best weak; the corresponding bromine derivative displays aggregates of bromine atoms and three-centre hydrogen bonds N+-H (-B r")2 . 
  Reference    Z. Naturforsch. 56b, 889—896 (2001); received May 15 2001 
  Published    2001 
  Keywords    Pyridinium, Halides, Hydrogen Bonds 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0889.pdf 
 Identifier    ZNB-2001-56b-0889 
 Volume    56