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Acta Cryst. (2005). E61, o2431-o2432  [ doi:10.1107/S1600536805019653 ]

Propyl 3,6-diphenyl-1,4-dihydro-1,2,4,5-tetrazine-1-carboxylate

G.-W. Rao and W.-X. Hu

Online 9 July 2005


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Alert level C PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical . ? PLAT089_ALERT_3_C Poor Data / Parameter Ratio (Zmax .LT. 18) ..... 7.23 PLAT220_ALERT_2_C Large Non-Solvent C Ueq(max)/Ueq(min) ... 2.55 Ratio PLAT241_ALERT_2_C Check High Ueq as Compared to Neighbors for C11 PLAT340_ALERT_3_C Low Bond Precision on C-C bonds (x 1000) Ang ... 6 PLAT790_ALERT_4_C Centre of Gravity not Within Unit Cell: Resd. # 1 C18 H18 N4 O2
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 25.17 From the CIF: _reflns_number_total 1584 Count of symmetry unique reflns 1584 Completeness (_total/calc) 100.00% TEST3: Check Friedels for noncentro structure Estimate of Friedel pairs measured 0 Fraction of Friedel pairs measured 0.000 Are heavy atom types Z>Si present no
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 6 ALERT level C = Check and explain 1 ALERT level G = General alerts; check 1 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 2 ALERT type 3 Indicator that the structure quality may be low 2 ALERT type 4 Improvement, methodology, query or suggestion

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