Acta Cryst. (2005). E61, o3086-o3088  [ doi:10.1107/S1600536805026991 ]

5-Hydroxy-3,7-dimethoxy-2-phenyl-4H-1-benzopyran-4-one

H.-K. Fun, I. A. Razak, N. Boonnak, S. Laphookhieo and S. Chantrapromma

Online 31 August 2005

Key indicators

• Single-crystal X-ray study
• T = 100 K
• Mean (C-C) = 0.002 Å
• R factor = 0.045
• wR factor = 0.142
• Data-to-parameter ratio = 24.7

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical .          ?
PLAT200_ALERT_1_C Check the Reported _diffrn_ambient_temperature .        293 K     
PLAT432_ALERT_2_C Short Inter X...Y Contact  O4B    ..  C17A    ..       2.99 Ang.  
PLAT720_ALERT_4_C Number of Unusual/Non-Standard Label(s) ........         12       

   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

   2 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
   1 ALERT type 4 Improvement, methodology, query or suggestion

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