Acta Cryst. (2002). E58, o240-o242  [ doi:10.1107/S1600536802002076 ]

A tetra-tert-butylcalix[4]arene-12-crown-4 N,N-dimethylformamide inclusion complex

J. C. Bryan and T. G. Levitskaia

Online 8 February 2002

Key indicators

• Single-crystal X-ray study
• T = 173 K
• Mean (C-C) = 0.004 Å
• R factor = 0.058
• wR factor = 0.171
• Data-to-parameter ratio = 14.8

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


 Alert Level C:



DIFMX_01  Alert C The maximum difference density is > 0.1*ZMAX*0.75             
          _refine_diff_density_max given =      0.660                           
          Test value =      0.600                                               

DIFMX_02  Alert C The minimum difference density is > 0.1*ZMAX*0.75             
          The relevant atom site should be identified.                          

PLAT_213  Alert C Atom C50     has ADP max/min Ratio ...........       3.10 prolate


 0 Alert Level A = Potentially serious problem

 0 Alert Level B = Potential problem

 3 Alert Level C = Please check

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