(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2006). E62, o261-o263 [ doi:10.1107/S1600536805039863 ]

3,10-Dichloro-5,12-dihydroquino[2,3-b]acridine-7,14-dione

T. Senju, T. Hoki and J. Mizuguchi

Key indicators

Single-crystal X-ray study
T = 93 K
Mean (C-C) = 0.004 Å
R factor = 0.057
wR factor = 0.172
Data-to-parameter ratio = 10.5

checkCIF/PLATON results

No syntax errors found



Alert level A
PLAT029_ALERT_3_A _diffrn_measured_fraction_theta_full Low .......       0.93

Author Response: A two-dimensional detector (IP) was used in combination with Cu as radiation.


Alert level C
REFLT03_ALERT_3_C  Reflection count < 95% complete
           From the CIF: _diffrn_reflns_theta_max           68.22
           From the CIF: _diffrn_reflns_theta_full          68.22
           From the CIF: _reflns_number_total               1254
           TEST2: Reflns within _diffrn_reflns_theta_max
           Count of symmetry unique reflns         1347
           Completeness (_total/calc)             93.10%
PLAT022_ALERT_3_C Ratio Unique / Expected Reflections too Low ....       0.93       

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

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