Water Bridged Assembly and Dimer Formation in Co-Crystals of Caffeine or Theophylline with Polycarboxylic Acids
Das, Babulal; Baruah, Jubaraj B.; Crystal Growth & Design 11 (2011) 278–286; doi:10.1021/cg1012846

data_4500224
_publ_section_title
;
 Water Bridged Assembly and Dimer Formation in Co-Crystals of Caffeine or
 Theophylline with Polycarboxylic Acids
;
_journal_coden_ASTM              CGDEFU
_journal_issue                   1
_journal_name_full               'Crystal Growth & Design'
_journal_page_first              278
_journal_page_last               286
_journal_paper_doi               10.1021/cg1012846
_journal_volume                  11
_journal_year                    2011
_chemical_formula_sum            'C25 H26 N8 O10'
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_atom_sites_solution_primary     direct
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_cell_formula_units_Z            2
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_cell_length_b                   10.3730(4)
_cell_length_c                   15.3939(7)
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_computing_cell_refinement       'Bruker SMART'
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_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.981
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_diffrn_radiation_monochromator  graphite
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_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.31
_exptl_absorpt_coefficient_mu    0.115
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.455
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
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_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
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_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1831P)^2^+0.0057P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2149
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_reflns_number_gt                2721
_reflns_number_total             4733
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg1012846_si_006.cif
_cod_data_source_block           bztca-caf_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1366.35(10)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4500224