Hydrogen bond synthon competition in the stabilization of theophylline cocrystals
Sarma, Bipul; Saikia, Basanta; CrystEngComm 16 (2014) 4753–; doi:10.1039/c3ce42332h

data_7215947
_publ_section_title
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 Hydrogen bond synthon competition in the stabilization of theophylline
 cocrystals
;
_journal_issue                   22
_journal_name_full               CrystEngComm
_journal_page_first              4753
_journal_paper_doi               10.1039/c3ce42332h
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'C7H8N4O2, C6H6O2, H2O'
_chemical_formula_sum            'C13 H16 N4 O5'
_chemical_formula_weight         308.30
_chemical_name_systematic
; 
 Theophylline, Resorcinol cocrystal monohydrate 
;
_space_group_IT_number           9
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 109.072(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.0728(4)
_cell_length_b                   8.7248(4)
_cell_length_c                   14.6199(7)
_cell_measurement_reflns_used    5681
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.37
_cell_measurement_theta_min      3.04
_cell_volume                     1334.87(10)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.975
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0899
_diffrn_reflns_av_sigmaI/netI    0.1259
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            10271
_diffrn_reflns_theta_full        28.69
_diffrn_reflns_theta_max         28.69
_diffrn_reflns_theta_min         2.95
_exptl_absorpt_coefficient_mu    0.120
_exptl_absorpt_correction_T_max  0.9811
_exptl_absorpt_correction_T_min  0.9706
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.534
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.479
_refine_diff_density_min         -0.717
_refine_diff_density_rms         0.212
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.6(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.252
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     221
_refine_ls_number_reflns         3196
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.251
_refine_ls_R_factor_all          0.0628
_refine_ls_R_factor_gt           0.0291
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0707P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0849
_refine_ls_wR_factor_ref         0.1215
_reflns_number_gt                2751
_reflns_number_total             3196
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce42332h.txt
_cod_data_source_block           cc
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      Cc
_cod_database_code               7215947