(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2003). E59, o472-o473 [ doi:10.1107/S1600536803005312 ]

Di-tert-butyl 3,6-bis(2-methylphenyl)-1,4-dioxo-1,2,4,5-tetrahydropyrrolo[3,4-c]pyrrole-2,5-dicarboxylate

J. Mizuguchi

Online 21 March 2003

Key indicators

Single-crystal X-ray study
T = 93 K
Mean (C-C) = 0.004 Å
R factor = 0.048
wR factor = 0.107
Data-to-parameter ratio = 13.0

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


 Alert Level C:



REFLT_03                                                                        
         From the CIF: _diffrn_reflns_theta_max           68.25                 
         From the CIF: _reflns_number_total               2243                  
         TEST2: Reflns within _diffrn_reflns_theta_max                          
         Count of symmetry unique reflns         2407                           
         Completeness (_total/calc)             93.19%                          
          Alert C: < 95% complete                                               


 0 Alert Level A = Potentially serious problem

 0 Alert Level B = Potential problem

 1 Alert Level C = Please check