Acta Cryst. (2002). E58, o1432-o1433  [ doi:10.1107/S1600536802021189 ]

2-Chloro-1,3-dioxa-2³³-phosphaanthracen-4-one

P. G. Jones, C. Kunze, H. Thönnessen and R. Schmutzler

Online 30 November 2002

Key indicators

• Single-crystal X-ray study
• T = 173 K
• Mean (C-C) = 0.003 Å
• R factor = 0.035
• wR factor = 0.083
• Data-to-parameter ratio = 16.3

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry

General Notes



REFLT_03                                                                        
         From the CIF: _diffrn_reflns_theta_max           27.54                 
         From the CIF: _reflns_number_total               2367                  
         Count of symmetry unique reflns         1396                           
         Completeness (_total/calc)            169.56%                          
         TEST3: Check Friedels for noncentro structure                          
         Estimate of Friedel pairs measured       971                           
         Fraction of Friedel pairs measured     0.696                           
         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.          

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