(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2002). E58, o254-o256 [ doi:10.1107/S1600536801021857 ]

1-Ethyl-4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxylic acid

S. V. Shishkina, O. V. Shishkin, I. V. Ukrainets, A. N. Dakkah and L. V. Sidorenko

Online 8 February 2002

Key indicators

Single-crystal X-ray study
T = 293 K
Mean (C-C) = 0.002 Å
R factor = 0.038
wR factor = 0.116
Data-to-parameter ratio = 11.6

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


 Alert Level C:



ABSMU_01  Alert C The ratio of given/expected absorption coefficient lies       
          outside the range 0.99 <> 1.01                                        
          Calculated value of mu =     0.108                                    
          Value of mu given      =     0.110                                    

SHFSU_01  Alert C The absolute value of parameter shift to su ratio > 0.05      
          Absolute value of the parameter shift to su ratio given   0.085       
          Additional refinement cycles may be required.                         


 0 Alert Level A = Potentially serious problem

 0 Alert Level B = Potential problem

 2 Alert Level C = Please check