Acta Cryst. (2002). E58, o575-o577  [ doi:10.1107/S1600536802007201 ]

4,4'-Bipyridine 1,2-diiodo-3,4,5,6-tetrafluorobenzene

R. Liantonio, P. Metrangolo, T. Pilati and G. Resnati

Online 30 April 2002

Key indicators

• Single-crystal X-ray study
• T = 290 K
• Mean (C-C) = 0.007 Å
• R factor = 0.038
• wR factor = 0.094
• Data-to-parameter ratio = 15.7

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


 Alert Level C:



PLAT_731  Alert C Bond    Calc     0.93(5), Rep     0.94(2) ....       2.50 s.u-Ratio
                     C2C  -H2C     1.555   1.555

PLAT_731  Alert C Bond    Calc     0.93(5), Rep     0.93(2) ....       2.50 s.u-Ratio
                     C2D  -H2D     1.555   1.555

PLAT_731  Alert C Bond    Calc     0.94(5), Rep     0.93(2) ....       2.50 s.u-Ratio
                     C5D  -H5D     1.555   1.555

PLAT_735  Alert C D-H     Calc     0.93(5), Rep     0.94(2) ....       2.50 s.u-Ratio
                     C2C  -H2C     1.555   1.555

PLAT_735  Alert C D-H     Calc     0.93(5), Rep     0.93(2) ....       2.50 s.u-Ratio
                     C2D  -H2D     1.555   1.555

General Notes



ABSTM_02  When printed, the submitted absorption T values will be replaced      
          by the scaled T values. Since the ratio of scaled T's is              
          identical to the ratio of reported T values, the scaling does         
          not imply a change to the absorption corrections used in the          
          study.                                                                
          Ratio of Tmax expected/reported      0.673                            
          Tmax scaled      0.662 Tmin scaled      0.450                         


 0 Alert Level A = Potentially serious problem

 0 Alert Level B = Potential problem

 5 Alert Level C = Please check

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