(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2009). E65, o100 [ doi:10.1107/S1600536808041457 ]

7-Methyl-9-p-tolyl-4,9-dihydrofuro[3,4-b]quinolin-1(3H)-one

C. Shi and M. Ji

Online 13 December 2008

Key indicators

Single-crystal X-ray study
T = 223 K
Mean (C-C) = 0.003 Å
R factor = 0.059
wR factor = 0.135
Data-to-parameter ratio = 13.2

checkCIF/PLATON results

No syntax errors found




Alert level C
ABSTM02_ALERT_3_C  The ratio of expected to reported Tmax/Tmin(RR') is < 0.90
            Tmin and Tmax reported:      0.756     0.962
            Tmin(prime) and Tmax expected:      0.949     0.962
            RR(prime) =      0.797
            Please check that your absorption correction is appropriate.
            Value of measurement temperature given =   223.000
            Value of melting point given =     0.000
PLAT411_ALERT_2_C Short Inter H...H Contact  H18    ..  H18     ..       2.14 Ang. 
PLAT432_ALERT_2_C Short Inter X...Y Contact  O2     ..  C12     ..       2.98 Ang. 
PLAT061_ALERT_4_C Tmax/Tmin Range Test RR' too Large .............       0.80      

Alert level G
PLAT793_ALERT_4_G The Model has Chirality at C3      (Verify) ....          R      

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

   0 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
   2 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check