Exploring cocrystal-cocrystal reactivity via liquid-assisted grinding: assembling of racemic and dismantling of enantiomeric cocrystals
W. Jones; Jonathan C. Burley; Laszlo Fabian; Tomislav Friscic; W. D. Sam Motherwell; Chemical Communications  (2006) –; doi:10.1039/b613073a

data_7101604
_publ_section_title
;
Exploring cocrystal-cocrystal reactivity via
liquid-assisted grinding: assembling of racemic and dismantling of
enantiomeric cocrystals
;
_journal_issue                   48
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/b613073a
_journal_year                    2006
_chemical_formula_moiety         'C4 H6 O6, 2(C7 H8 N4 O2)'
_chemical_formula_sum            'C18 H22 N8 O10'
_chemical_formula_weight         510.44
_chemical_name_common            'theophylline DL-tartaric acid 2/1'
_chemical_name_systematic
;
theophylline DL-tartaric acid 2/1
;
_space_group_IT_number           2
_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
_cell_angle_alpha                98.294(1)
_cell_angle_beta                 99.466(1)
_cell_angle_gamma                94.527(1)
_cell_formula_units_Z            2
_cell_length_a                   7.3102(1)
_cell_length_b                   8.3730(1)
_cell_length_c                   17.9724(3)
_cell_measurement_reflns_used    9463
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      30.03
_cell_measurement_theta_min      1.00
_cell_volume                     1067.78(3)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius B.V. 1998)'
_computing_data_reduction
;
HKL Denzo and Scalepack (Otwinowski & Minor 1997)
;
_computing_publication_material  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_solution    'SIR-92 (Altomare et al. 1994)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       'Thin slice \w and \f scans'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0233
_diffrn_reflns_av_sigmaI/netI    0.0319
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            14382
_diffrn_reflns_theta_full        29.99
_diffrn_reflns_theta_max         29.99
_diffrn_reflns_theta_min         3.57
_exptl_absorpt_coefficient_mu    0.132
_exptl_absorpt_correction_T_max  0.974
_exptl_absorpt_correction_T_min  0.921
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements
Sortav (Blessing 1995)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.588
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             532
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.451
_refine_diff_density_min         -0.330
_refine_diff_density_rms         0.077
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     333
_refine_ls_number_reflns         6105
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0458
_refine_ls_R_factor_gt           0.0374
_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^)+(0.0574P)^2^+0.3834P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1027
_refine_ls_wR_factor_ref         0.1147
_reflns_number_gt                5302
_reflns_number_total             6105
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b613073a.txt
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7101604