Acta Cryst. (2008). E64, o597  [ doi:10.1107/S1600536808004169 ]

1,3-Dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2-carbaldehyde

K. Awang, N. H. Ismail, R. Ahmad, N. H. Saidan and P. Retailleau

Online 15 February 2008

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean (C-C) = 0.003 Å
• R factor = 0.052
• wR factor = 0.150
• Data-to-parameter ratio = 12.7

checkCIF/PLATON results

No syntax errors found




Alert level B
PLAT430_ALERT_2_B Short Inter D...A Contact  O5     ..  O5      ..       2.84 Ang. 

Alert level C
PLAT230_ALERT_2_C Hirshfeld Test Diff for    O2     -   C15     ..       5.68 su   
PLAT333_ALERT_2_C Large Average Benzene C-C Dist.  C5     -C14           1.45 Ang. 

Alert level G
PLAT199_ALERT_1_G Check the Reported _cell_measurement_temperature        293 K    
PLAT200_ALERT_1_G Check the Reported _diffrn_ambient_temperature .        293 K    

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

   2 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   3 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
   0 ALERT type 5 Informative message, check

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