(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2002). E58, o640-o641 [ doi:10.1107/S160053680200822X ]

(1R,2R)-Bis(4-pyridylmethyleneamino)cyclohexane

X.-J. Yuan, Y.-Z. Li, Y.-J. Liu, Y.-Q. Tian and X.-Z. You

Online 17 May 2002

Key indicators

Single-crystal X-ray study
T = 293 K
Mean (C-C) = 0.003 Å
R factor = 0.053
wR factor = 0.143
Data-to-parameter ratio = 14.7

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               1473                  
         Count of symmetry unique reflns          889                           
         Completeness (_total/calc)            165.69%                          
         TEST3: Check Friedels for noncentro structure                          
         Estimate of Friedel pairs measured       584                           
         Fraction of Friedel pairs measured     0.657                           
         Are heavy atom types Z>Si present           no                         
          ALERT: MoKa measured Friedel data cannot be used to                   
                 determine absolute structure in a light-atom                   
                 study EXCEPT under VERY special conditions.                    
                 It is preferred that Friedel data is merged in such cases.