Acta Cryst. (2005). E61, o3899-o3900  [ doi:10.1107/S1600536805034495 ]

(4aSR,10aRS)-1,2,3,4,4a,10a-Hexahydro-6,7-dimethoxy-1,1,4a-trimethylphenanthrene-9,10-dione

Y. Xiong, C.-R. Sun, M.-L. Hu and M.-C. Liu

Online 31 October 2005

Key indicators

• Single-crystal X-ray study
• T = 298 K
• Mean (C-C) = 0.004 Å
• R factor = 0.083
• wR factor = 0.165
• Data-to-parameter ratio = 13.9

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT369_ALERT_2_C Long   C(sp2)-C(sp2) Bond  C7     -   C8     ...       1.55 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

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