Acta Cryst. (2005). E61, o910-o911  [ doi:10.1107/S1600536805006938 ]

6,8'-Dimethoxy-2,2'-spirobichroman

G. R. Clark, C. L. Flowers and M. A. Brimble

Online 11 March 2005

Key indicators

• Single-crystal X-ray study
• T = 84 K
• Mean (C-C) = 0.004 Å
• R factor = 0.068
• wR factor = 0.173
• Data-to-parameter ratio = 14.1

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical .          ?
PLAT094_ALERT_2_C Ratio of Maximum / Minimum Residual Density ....       2.27       

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

   1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   1 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
   0 ALERT type 4 Improvement, methodology, query or suggestion

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