Effect of the Counterion on the Solubility of Isostructural Pharmaceutical Lamotrigine Salts
Galcera, Judit; Molins, Elies; Crystal Growth & Design 9 (2009) 327–; doi:10.1021/cg8005025

data_4511178
_publ_section_title
;
 Effect of the Counterion on the Solubility of Isostructural
 Pharmaceutical Lamotrigine Salts
;
_journal_issue                   1
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              327
_journal_paper_doi               10.1021/cg8005025
_journal_volume                  9
_journal_year                    2009
_chemical_formula_moiety         'C9 H7 Cl2 N5, 0.5(C4 H6 O4), C3 H6 O2'
_chemical_formula_sum            'C14 H16 Cl2 N5 O4'
_chemical_formula_weight         389.22
_chemical_name_common
'Lamotrigine hemisuccinate 1,3-dioxolane solvate'
_chemical_name_systematic
;
3,5-diamino-6-(2,3-dichlorophenyl)-1,2,4-triazin-2-ium - succinate - 
1,3-dioxolane (1:0.5:1)
;
_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                 109.864(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.3190(10)
_cell_length_b                   10.574(2)
_cell_length_c                   15.836(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      2
_cell_measurement_theta_min      33.1
_cell_volume                     1782.6(4)
_computing_cell_refinement       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_collection       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.685
_diffrn_measured_fraction_theta_max 0.685
_diffrn_measurement_device_type  'Enraf Nonius CAD4'
_diffrn_measurement_method       'non-profiled omega/2theta 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  0.1414
_diffrn_reflns_av_sigmaI/netI    0.4241
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2376
_diffrn_reflns_theta_full        25.63
_diffrn_reflns_theta_max         25.63
_diffrn_reflns_theta_min         2.74
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.394
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.450
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             804
_exptl_crystal_size_max          0.46
_exptl_crystal_size_mid          0.41
_exptl_crystal_size_min          0.27
_refine_diff_density_max         0.253
_refine_diff_density_min         -0.225
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.916
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     225
_refine_ls_number_reflns         2307
_refine_ls_number_restraints     16
_refine_ls_restrained_S_all      0.914
_refine_ls_R_factor_all          0.3569
_refine_ls_R_factor_gt           0.0727
_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^)+(0.1096P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1617
_refine_ls_wR_factor_ref         0.2398
_reflns_number_gt                773
_reflns_number_total             2307
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg8005025_si_001.cif
_cod_data_source_block
1b_Lamotrigine_hemisuccinate_1,3-dioxolane_solvate
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4511178