Tuning mechanical behaviour by controlling the structure of a series of theophylline co-crystals
Kakkar, Shubhangi; Bhattacharya, Biswajit; Reddy, C. Malla; Ghosh, Soumyajit; CrystEngComm 20 (2018) 1101–; doi:10.1039/C7CE01915G

data_7229995
_publ_section_title
;
 Tuning mechanical behaviour by controlling the structure of a series of
 theophylline co-crystals
;
_journal_issue                   8
_journal_name_full               CrystEngComm
_journal_page_first              1101
_journal_paper_doi               10.1039/C7CE01915G
_journal_volume                  20
_journal_year                    2018
_chemical_formula_moiety         'C7 H8 N4 O2, 2(C7 H4 Cl2 O2)'
_chemical_formula_sum            'C21 H16 Cl4 N4 O6'
_chemical_formula_weight         562.18
_chemical_melting_point          457.13
_chemical_name_common            'Theophylline:3,4 dichlorobenzoic acid'
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2012-12-10 deposited with the CCDC.
2018-01-17 downloaded from the CCDC.
;
_cell_angle_alpha                98.980(5)
_cell_angle_beta                 108.898(5)
_cell_angle_gamma                108.434(5)
_cell_formula_units_Z            2
_cell_length_a                   10.191(3)
_cell_length_b                   10.459(3)
_cell_length_c                   12.777(3)
_cell_measurement_reflns_used    4112
_cell_measurement_temperature    296
_cell_measurement_theta_max      26.47
_cell_measurement_theta_min      2.30
_cell_volume                     1170.6(6)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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
_diffrn_measured_fraction_theta_full 0.960
_diffrn_measured_fraction_theta_max 0.960
_diffrn_measurement_device_type  'BRUKER KAPPA APEX II DUO'
_diffrn_measurement_method       'phi and omega 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  0.0383
_diffrn_reflns_av_sigmaI/netI    0.0452
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            14470
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         1.76
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.553
_exptl_absorpt_correction_T_max  0.885
_exptl_absorpt_correction_T_min  0.757
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'multi-scan absorption correction'
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.595
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             572
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.42
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.338
_refine_diff_density_min         -0.301
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.013
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     324
_refine_ls_number_reflns         4908
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0908
_refine_ls_R_factor_gt           0.0442
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0530P)^2^+0.6157P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1041
_refine_ls_wR_factor_ref         0.1340
_reflns_number_gt                2893
_reflns_number_total             4908
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7ce01915g2.cif
_cod_data_source_block           cmr_sg_132_1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to
/home/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 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 7229994--7229999.cif.
;
_cod_original_cell_volume        1170.6(5)
_cod_original_sg_symbol_H-M      'P-1 '
_cod_database_code               7229995