Acta Cryst. (2006). E62, o2125-o2126  [ doi:10.1107/S1600536806015261 ]

4,5,12,13-Tetraacetyl[2.2]paracyclophane

S. V. Narayanan, H. Hopf and P. G. Jones

Online 5 May 2006

Key indicators

• Single-crystal X-ray study
• T = 133 K
• Mean (C-C) = 0.002 Å
• R factor = 0.047
• wR factor = 0.132
• Data-to-parameter ratio = 21.1

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT125_ALERT_4_C No _symmetry_space_group_name_Hall Given .......          ?
PLAT480_ALERT_4_C Long H...A H-Bond Reported H10D   ..  O1      ..       2.63 Ang.  
PLAT480_ALERT_4_C Long H...A H-Bond Reported H1A    ..  O1'     ..       2.67 Ang.  
PLAT720_ALERT_4_C Number of Unusual/Non-Standard Label(s) ........          4       

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   4 ALERT level C = Check and explain
   0 ALERT level G = General alerts; check

   0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   0 ALERT type 2 Indicator that the structure model may be wrong or deficient
   0 ALERT type 3 Indicator that the structure quality may be low
   4 ALERT type 4 Improvement, methodology, query or suggestion

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