Acta Cryst. (2003). E59, o792-o793  [ doi:10.1107/S1600536803009589 ]

4,4'-Trimethylenedipyridinium dinitrate

T. W. Lee, J. P. K. Lau and L. Szeto

Online 16 May 2003

Key indicators

• Single-crystal X-ray study
• T = 298 K
• Mean (C-C) = 0.004 Å
• R factor = 0.044
• wR factor = 0.048
• Data-to-parameter ratio = 8.2

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


 Alert Level C:



REFNR_01  Alert C Ratio of reflections to parameters is < 10 for a              
          centrosymmetric structure                                             
          sine(theta)/lambda                0.5947                              
          Proportion of unique data used    0.6222                              
          Ratio reflections to parameters   8.2201                              


 0 Alert Level A = Potentially serious problem

 0 Alert Level B = Potential problem

 1 Alert Level C = Please check

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