Acta Cryst. (2005). E61, o3701-o3703  [ doi:10.1107/S1600536805032320 ]

3,3,6,6-Tetramethyl-9-(2-oxo-1,2-dihydroquinolin-3-yl)-1,2,3,4,5,6,7,8-octahydro-9H-xanthene-1,8-dione

S. Selvanayagam, J. Paul, D. Velmurugan, K. Ravikumar and R. R. Rathna Durga

Online 15 October 2005

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean (C-C) = 0.002 Å
• R factor = 0.050
• wR factor = 0.145
• Data-to-parameter ratio = 18.8

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT199_ALERT_1_C Check the Reported _cell_measurement_temperature        293 K     
PLAT200_ALERT_1_C Check the Reported _diffrn_ambient_temperature .        293 K     
PLAT220_ALERT_2_C Large Non-Solvent    C     Ueq(max)/Ueq(min) ...       2.51 Ratio 
PLAT222_ALERT_3_C Large Non-Solvent    H     Ueq(max)/Ueq(min) ...       3.07 Ratio 

   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
   1 ALERT type 3 Indicator that the structure quality may be low
   0 ALERT type 4 Improvement, methodology, query or suggestion

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