(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2002). E58, o252-o253 [ doi:10.1107/S1600536802001137 ]

[(2R,5S)-2,5-Bis(4-nitrophenyl)perhydrofuro[2,3-b]furan-3-yl]triisopropylsilane

M. E. Light and M. B. Hursthouse

Online 8 February 2002

Key indicators

Single-crystal X-ray study
T = 120 K
Mean (C-C) = 0.003 Å
R factor = 0.034
wR factor = 0.081
Data-to-parameter ratio = 14.1

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry

General Notes



REFLT_03                                                                        
         From the CIF: _diffrn_reflns_theta_max           25.02                 
         From the CIF: _reflns_number_total               4610                  
         Count of symmetry unique reflns         2636                           
         Completeness (_total/calc)            174.89%                          
         TEST3: Check Friedels for noncentro structure                          
         Estimate of Friedel pairs measured      1974                           
         Fraction of Friedel pairs measured     0.749                           
         Are heavy atom types Z>Si present          yes                         
          Please check that the estimate of the number of Friedel pairs is      
          correct. If it is not, please give the correct count in the           
          _publ_section_exptl_refinement section of the submitted CIF.