Acta Cryst. (2011). E67, m238  [ doi:10.1107/S1600536811001929 ]

3-Methoxycarbonyl-1-methylpyrazinium tetrachlorido(pyrazine-2-carboxylato-²N¹,O)stannate(IV)

E. Najafi, M. M. Amini and S. W. Ng

Online 22 January 2011

Key indicators

• Single-crystal X-ray study
• T = 100 K
• Mean (C-C) = 0.004 Å
• R factor = 0.025
• wR factor = 0.059
• Data-to-parameter ratio = 17.4

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT029_ALERT_3_C _diffrn_measured_fraction_theta_full Low .......       0.96      
PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) .....          1      
PLAT912_ALERT_4_C Missing # of FCF Reflections Above STh/L=  0.600        145      

Alert level G
PLAT432_ALERT_2_G Short Inter X...Y Contact  O1     ..  C10     ..       2.91 Ang. 
PLAT432_ALERT_2_G Short Inter X...Y Contact  O2     ..  C9      ..       2.92 Ang. 
PLAT432_ALERT_2_G Short Inter X...Y Contact  O4     ..  C3      ..       2.97 Ang. 
PLAT128_ALERT_4_G Alternate Setting of Space-group P21/c   .......      P21/n      
PLAT794_ALERT_5_G Note: Tentative Bond Valency for Sn1     .......       4.08      

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   3 ALERT level C = Check and explain
   5 ALERT level G = General alerts; check

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

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