Solution cocrystallization, an effective tool to explore the variety of cocrystal systems: caffeine/dicarboxylic acid cocrystals
Leyssens, T.; Tumanova, N.; Robeyns, K.; Candoni, N.; Veesler, S.; CrystEngComm 16 (2014) 9603–; doi:10.1039/C4CE01495B

data_7217872
_publ_section_title
;
 Solution cocrystallization, an effective tool to explore the variety of
 cocrystal systems: caffeine/dicarboxylic acid cocrystals
;
_journal_issue                   41
_journal_name_full               CrystEngComm
_journal_page_first              9603
_journal_paper_doi               10.1039/C4CE01495B
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         '4(C8 H10 N4 O2), 2(C5 H6 O4), C2 H3 N'
_chemical_formula_sum            'C44 H55 N17 O16'
_chemical_formula_weight         1078.05
_space_group_crystal_system      monoclinic
_space_group_IT_number           9
_space_group_name_Hall           'C -2yc'
_space_group_name_H-M_alt        'C 1 c 1'
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014
_cell_angle_alpha                90
_cell_angle_beta                 96.236(8)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   44.164(3)
_cell_length_b                   3.94516(19)
_cell_length_c                   27.676(3)
_cell_measurement_reflns_used    3194
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.4820
_cell_measurement_theta_min      2.1490
_cell_volume                     4793.6(7)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
(compiled Jan 14 2014,18:38:05)
;
_computing_data_collection       MAR
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
(compiled Jan 14 2014,18:38:05)
;
_computing_molecular_graphics    'MERCURY (Macrae et al., 2008)'
_computing_publication_material
;
'MERCURY (Macrae et al., 2008), Platon (Spek, 2009)'

;
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.899
_diffrn_measured_fraction_theta_max 0.899
_diffrn_measurement_device_type  'pilatus 2M'
_diffrn_measurement_method       '360 images, \D\F 1.0\% '
_diffrn_radiation_monochromator  Si(111)
_diffrn_radiation_source         synchrotron
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.82103
_diffrn_reflns_av_unetI/netI     0.0588
_diffrn_reflns_Laue_measured_fraction_full 0.899
_diffrn_reflns_Laue_measured_fraction_max 0.899
_diffrn_reflns_limit_h_max       52
_diffrn_reflns_limit_h_min       -52
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            12341
_diffrn_reflns_point_group_measured_fraction_full 0.890
_diffrn_reflns_point_group_measured_fraction_max 0.890
_diffrn_reflns_theta_full        29.513
_diffrn_reflns_theta_max         29.513
_diffrn_reflns_theta_min         1.710
_exptl_absorpt_coefficient_mu    0.162
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.47179
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
(compiled Jan 14 2014,18:38:05)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.494
_exptl_crystal_description       needle
_exptl_crystal_F_000             2264
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.520
_refine_diff_density_min         -0.426
_refine_diff_density_rms         0.103
_refine_ls_abs_structure_details
;
 Flack x determined using 2966 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.5(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     712
_refine_ls_number_reflns         12341
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.1003
_refine_ls_R_factor_gt           0.0951
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1525P)^2^+10.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2474
_refine_ls_wR_factor_ref         0.2544
_reflns_Friedel_coverage         0.979
_reflns_Friedel_fraction_full    0.881
_reflns_Friedel_fraction_max     0.881
_reflns_number_gt                11132
_reflns_number_total             12341
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4ce01495b2.cif
_cod_data_source_block           Gam03A
_cod_depositor_comments
'Adding full bibliography for 7217867--7217872.cif.'
_cod_database_code               7217872
_shelxl_version_number           2014-3
_shelx_res_checksum              49099