Acta Cryst. (2002). E58, o59-o61  [ doi:10.1107/S1600536801020293 ]

Hydrogen-bonding patterns in trimethoprim perchlorate [trimethoprim = 2,4-diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine]

P. T. Muthiah, B. Umadevi, N. Stanley, G. Bocelli and A. Cantoni

Online 14 December 2001

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean (C-C) = 0.002 Å
• R factor = 0.048
• wR factor = 0.168
• Data-to-parameter ratio = 21.4

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry

General Notes



FORMU_01  There is a discrepancy between the atom counts in the                 
          _chemical_formula_sum and _chemical_formula_moiety. This is           
          usually due to the moiety formula being in the wrong format.          
          Atom count from _chemical_formula_sum:   C14 H19 Cl1 N4 O7            
          Atom count from _chemical_formula_moiety:C14 H19 Cl1 N4 O4            

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