checkCIF procedure

PLAT222

 This test reports on a larger than usual range of U(eq) values for hydrogen
 atoms in the non-solvent/anion part of the structure.  
 Possible causes are:   
 1 - disorder, e.g. in t-butyl moieties.
 2 - poor data, not adequate for the refinement of individual displacement  
     parameters.
 3 - Misplaced hydrogen atoms (i.e. there is no density at the position 
     where one of the H-atoms is positioned).