(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2003). E59, o808-o809 [ doi:10.1107/S1600536803009978 ]

1,2,3,4,4a,12a-Hexahydro-2,5,5-trimethyl-1H-[2]benzopyrano[3,2-c]coumarin

R. Krishna, S. Selvanayagam, M. Yogavel, D. Velmurugan, M. Shanmugasundaram, R. Raghunathan, S. Shanmuga Sundara Raj and H.-K. Fun

Online 16 May 2003

Key indicators

Single-crystal X-ray study
T = 293 K
Mean (C-C) = 0.003 Å
R factor = 0.042
wR factor = 0.114
Data-to-parameter ratio = 11.3

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry

General Notes



REFLT_03                                                                        
         From the CIF: _diffrn_reflns_theta_max           28.30                 
         From the CIF: _reflns_number_total               2247                  
         Count of symmetry unique reflns         2253                           
         Completeness (_total/calc)             99.73%                          
         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.