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

data_7215953
_publ_section_title
;
 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, C9H8O2'
_chemical_formula_sum            'C16 H16 N4 O4'
_chemical_formula_weight         328.33
_chemical_name_systematic
; 
 Theophylline Cinnamic acid cocrystal 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 96.128(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.2792(7)
_cell_length_b                   8.7135(9)
_cell_length_c                   24.272(2)
_cell_measurement_reflns_used    3079
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      37.75
_cell_measurement_theta_min      2.49
_cell_volume                     1530.7(3)
_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      296(2)
_diffrn_measured_fraction_theta_full 0.936
_diffrn_measured_fraction_theta_max 0.936
_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  0.1296
_diffrn_reflns_av_sigmaI/netI    0.1005
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       42
_diffrn_reflns_limit_l_min       -37
_diffrn_reflns_number            20479
_diffrn_reflns_theta_full        38.48
_diffrn_reflns_theta_max         38.48
_diffrn_reflns_theta_min         1.69
_exptl_absorpt_coefficient_mu    0.105
_exptl_absorpt_correction_T_max  0.9916
_exptl_absorpt_correction_T_min  0.9671
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.425
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Neddle
_exptl_crystal_F_000             688
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.756
_refine_diff_density_min         -0.717
_refine_diff_density_rms         0.146
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.996
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         8056
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.996
_refine_ls_R_factor_all          0.1228
_refine_ls_R_factor_gt           0.0777
_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^)+(0.1409P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2043
_refine_ls_wR_factor_ref         0.2414
_reflns_number_gt                4961
_reflns_number_total             8056
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce42332h.txt
_cod_data_source_block           bs_cinnamicacidtheophylline_0m
_cod_depositor_comments
;
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      P2(1)/c
_cod_database_code               7215953