Acta Cryst. (2002). E58, o560-o561  [ doi:10.1107/S160053680200661X ]

4,4-Dimethyl-3,5,8,10-tetraoxatricyclo[5.2.1.0^2,6]decane

M. E. Light, P. J. Murphy, P. M. Brown and M. B. Hursthouse

Key indicators

• Single-crystal X-ray study
• T = 120 K
• Mean (C-C) = 0.004 Å
• R factor = 0.033
• wR factor = 0.069
• Data-to-parameter ratio = 6.9

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry

General Notes



REFLT_03                                                                        
         From the CIF: _diffrn_reflns_theta_max           25.00                 
         From the CIF: _reflns_number_total                771                  
         Count of symmetry unique reflns          775                           
         Completeness (_total/calc)             99.48%                          
         TEST3: Check Friedels for noncentro structure                          
         Estimate of Friedel pairs measured         0                           
         Fraction of Friedel pairs measured     0.000                           
         Are heavy atom types Z>Si present           no                         
          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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