Acta Cryst. (2012). E68, m1468
[ doi:10.1107/S1600536812045126 ]

catena-Poly[sodium-₂-(N,N,N',N'-tetramethylethane-1,2-diamine)-²N:N'-sodium-bis[₂-bis(trimethylsilyl)azanido-²N:N]]

A. R. Kennedy, R. E. Mulvey, C. T. O'Hara, S. D. Robertson and G. M. Robertson

Key indicators

• Single-crystal X-ray study
• T = 123 K
• Mean (C-C) = 0.001 Å
• R factor = 0.023
• wR factor = 0.067
• Data-to-parameter ratio = 25.5

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT230_ALERT_2_C Hirshfeld Test Diff for    Si1    --  C1      ..        5.6 su   
PLAT230_ALERT_2_C Hirshfeld Test Diff for    Si1    --  C2      ..        6.0 su   
PLAT230_ALERT_2_C Hirshfeld Test Diff for    Si1    --  C3      ..        5.4 su   
PLAT230_ALERT_2_C Hirshfeld Test Diff for    Si2    --  C5      ..        5.5 su   
PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) .....          4      
PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L=  0.600          2      
PLAT913_ALERT_3_C Missing # of Very Strong Reflections in FCF ....          1      
PLAT955_ALERT_1_C Reported and Actual Lmax Values in FCF Differ by          2      

Alert level G
PLAT004_ALERT_5_G Info: Polymeric Structure Found with Dimension .          1      
PLAT005_ALERT_5_G No _iucr_refine_instructions_details  in CIF ...          ?
PLAT042_ALERT_1_G Calc. and Reported MoietyFormula Strings  Differ          ?
PLAT045_ALERT_1_G Calculated and Reported Z Differ by ............       2.00 Ratio
PLAT128_ALERT_4_G Alternate Setting of Space-group P21/c   .......      P21/n      
PLAT764_ALERT_4_G Overcomplete CIF Bond List Detected (Rep/Expd) .       1.60 Ratio
PLAT912_ALERT_4_G Missing # of FCF Reflections Above STh/L=  0.600        488      

   0 ALERT level A = Most likely a serious problem - resolve or explain
   0 ALERT level B = A potentially serious problem, consider carefully
   8 ALERT level C = Check. Ensure it is not caused by an omission or oversight
   7 ALERT level G = General information/check it is not something unexpected

   3 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   4 ALERT type 2 Indicator that the structure model may be wrong or deficient
   3 ALERT type 3 Indicator that the structure quality may be low
   3 ALERT type 4 Improvement, methodology, query or suggestion
   2 ALERT type 5 Informative message, check

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