Acta Cryst. (2008). E64, o1555  [ doi:10.1107/S1600536808022113 ]

7,11-Bis(4-methylphenyl)-2,4,8,10-tetraazaspiro[5.5]undecane-1,3,5,9-tetraone

A. M. Astaraki, A. Bazgir and F. Faraji

Online 19 July 2008

Key indicators

• Single-crystal X-ray study
• T = 298 K
• Mean (C-C) = 0.005 Å
• R factor = 0.081
• wR factor = 0.148
• Data-to-parameter ratio = 16.0

checkCIF/PLATON results

No syntax errors found



Alert level A
PLAT481_ALERT_4_A Long D...A H-Bond Reported C4     ..  CG4     ..     131.19 Ang. 
PLAT481_ALERT_4_A Long D...A H-Bond Reported C10    ..  CG4     ..     140.61 Ang. 
PLAT482_ALERT_4_A Small D-H..A Angle Rep for C4     ..  CG4     ..       2.64 Deg. 
PLAT482_ALERT_4_A Small D-H..A Angle Rep for C10    ..  CG4     ..       3.66 Deg. 
PLAT725_ALERT_1_A D-H     Calc     0.96000, Rep     3.01800 Dev...       2.06 Ang. 
              C4   -H4B     1.555   1.555                                      
PLAT725_ALERT_1_A D-H     Calc     0.98000, Rep     3.10600 Dev...       2.13 Ang. 
              C10  -H10     1.555   1.555                                      

Alert level C
PLAT340_ALERT_3_C Low Bond Precision on C-C Bonds (x 1000) Ang ...          5      

Alert level G
PLAT793_ALERT_4_G Check the Absolute Configuration of C8     .....          R      
PLAT793_ALERT_4_G Check the Absolute Configuration of C10    .....          S      

   6 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   1 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
   0 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
   6 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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