Acta Cryst. (2004). E60, o1458-o1459  [ doi:10.1107/S1600536804018392 ]

2,2,5,5-Tetramethyl-1,6-diphenyl-7,8-diselenabicyclo[4.1.1]octane 7,8-dioxide

M.-X. Ding, B. Ma, R. Zhu, H.-T. Shan, J. Shao and X. Sheng

Online 7 August 2004

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean (C-C) = 0.014 Å
• R factor = 0.058
• wR factor = 0.235
• Data-to-parameter ratio = 16.8

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT152_ALERT_1_C Supplied and Calc Volume s.u. Inconsistent .....          ?
PLAT322_ALERT_2_C Check Hybridisation of  Se1    in Main Residue .          ?     
PLAT322_ALERT_2_C Check Hybridisation of  Se2    in Main Residue .          ?     
PLAT341_ALERT_3_C Low Bond Precision on C-C bonds (x 1000) Ang ...         14       

   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

   1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   2 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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