Acta Cryst. (2006). E62, o5401-o5403  [ doi:10.1107/S1600536806045065 ]

3-[(1Z)-1-Hydroxy-3-oxobut-1-en-1-yl]-7-methyl-2H,5H-pyrano[4,3-b]pyran-2,5-dione

N. Bouhaine, A. Gherrou and A. van der Lee

Online 3 November 2006

Key indicators

• Single-crystal X-ray study
• T = 120 K
• Mean (C-C) = 0.002 Å
• R factor = 0.039
• wR factor = 0.086
• Data-to-parameter ratio = 25.1

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT432_ALERT_2_C Short Inter X...Y Contact  C11    ..  C11     ..       3.11 Ang. 

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   1 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
   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
   0 ALERT type 5 Informative message, check

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