(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2007). E63, o3923 [ doi:10.1107/S1600536807041773 ]

5,7-Dimethoxy-3-(4-methoxyphenyl)-4H-chromen-4-one

H.-Q. Li, Z.-P. Xiao, Y. Han, R.-Q. Fang and H.-L. Zhu

Online 29 August 2007

Key indicators

Single-crystal X-ray study
T = 298 K
Mean (C-C) = 0.003 Å
R factor = 0.053
wR factor = 0.145
Data-to-parameter ratio = 13.5

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT029_ALERT_3_C _diffrn_measured_fraction_theta_full Low .......       0.96      
PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical .          ?
PLAT154_ALERT_1_C The su's on the Cell Angles are Equal  (x 10000)        200 Deg. 

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   3 ALERT level C = Check and explain
   0 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
   0 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check