(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2005). E61, o898-o900 [ doi:10.1107/S1600536805006902 ]

(3S,6R)-3-Benzyloxymethyl-6-methyl-1,4-dioxane-2,5-dione

H. Kooijman, M. Leemhuis, C. F. van Nostrum, W. E. Hennink and A. L. Spek

Online 11 March 2005

Key indicators

Single-crystal X-ray study
T = 150 K
Mean (C-C) = 0.003 Å
R factor = 0.031
wR factor = 0.076
Data-to-parameter ratio = 8.9

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT432_ALERT_2_C Short Inter X...Y Contact  O1     ..  C4      ..       2.92 Ang.  

Alert level G
REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is
            correct. If it is not, please give the correct count in the
            _publ_section_exptl_refinement section of the submitted CIF.
           From the CIF: _diffrn_reflns_theta_max           27.46
           From the CIF: _reflns_number_total               1464
           Count of symmetry unique reflns         1463
           Completeness (_total/calc)            100.07%
           TEST3: Check Friedels for noncentro structure
           Estimate of Friedel pairs measured         1
           Fraction of Friedel pairs measured     0.001
           Are heavy atom types Z>Si present         no

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   1 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
   1 ALERT type 2 Indicator that the structure model may be wrong or deficient
   0 ALERT type 3 Indicator that the structure quality may be low
   1 ALERT type 4 Improvement, methodology, query or suggestion