(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2002). E58, o1072-o1074 [ doi:10.1107/S160053680201588X ]

A monoclinic polymorph of venlafaxine hydrochloride

A. Sivalakshmidevi, K. Vyas, S. Mahender Rao and G. Om Reddy

Key indicators

Single-crystal X-ray study
T = 298 K
Mean (C-C) = 0.007 Å
R factor = 0.068
wR factor = 0.068
Data-to-parameter ratio = 9.1

checkCIF results

No syntax errors found

Structure: II
-------------

ADDSYM reports no extra symmetry


 Alert Level C:



REFNR_01  Alert C Ratio of reflections to parameters is < 10 for a              
          centrosymmetric structure                                             
          sine(theta)/lambda                0.6098                              
          Proportion of unique data used    0.5496                              
          Ratio reflections to parameters   9.1256                              

PLAT_031  Alert C Refined Extinction parameter within range ....       3.14 Sigma

General Notes



ABSTM_02  When printed, the submitted absorption T values will be replaced      
          by the scaled T values. Since the ratio of scaled T's is              
          identical to the ratio of reported T values, the scaling does         
          not imply a change to the absorption corrections used in the          
          study.                                                                
          Ratio of Tmax expected/reported      0.825                            
          Tmax scaled      0.821 Tmin scaled      0.695                         


 0 Alert Level A = Potentially serious problem

 0 Alert Level B = Potential problem

 2 Alert Level C = Please check