Sulfamerazine: Understanding the Influence of Slip Planes in the Polymorphic Phase Transformation through X-Ray Crystallographic Studies and ab Initio Lattice Dynamics
Anuradha R. Pallipurath; Jonathan M. Skelton; Mark R. Warren; Naghmeh Kamali; Patrick McArdle; Andrea Erxleben; Molecular Pharmaceutics 12 (2015) 3735–3748; doi:10.1021/acs.molpharmaceut.5b00504

data_1547409
_publ_section_title
;
 Sulfamerazine: Understanding the Influence of Slip Planes in the
 Polymorphic Phase Transformation through X-Ray Crystallographic Studies
 and ab Initio Lattice Dynamics
;
_journal_name_full               'Molecular Pharmaceutics'
_journal_page_first              3735
_journal_page_last               3748
_journal_paper_doi               10.1021/acs.molpharmaceut.5b00504
_journal_volume                  12
_journal_year                    2015
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C11 H12 N4 O2 S'
_chemical_formula_sum            'C11 H12 N4 O2 S'
_chemical_formula_weight         264.31
_chemical_name_common            Sulfamerazine
_chemical_name_systematic        4-amino-N-(4-methylpyrimidin-2-yl)
_space_group_crystal_system      orthorhombic
_space_group_IT_number           33
_space_group_name_Hall           'P 2c -2n'
_space_group_name_H-M_alt        'P n a 21'
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   mixed
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   14.4687(6)
_cell_length_b                   8.1829(9)
_cell_length_c                   21.8084(4)
_cell_measurement_reflns_used    2291
_cell_measurement_temperature    175.0(2)
_cell_measurement_theta_max      28.5850
_cell_measurement_theta_min      3.8550
_cell_volume                     2582.0(3)
_computing_cell_refinement
;
'Fri Dec 12 05:27:49 2014'
;
_computing_data_collection
;
'Fri Dec 12 05:27:49 2014'
;
_computing_data_reduction
;
'Fri Dec 12 05:27:49 2014'
;
_computing_molecular_graphics    OSCAIL
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    SHELXT
_diffrn_ambient_temperature      175.0(2)
_diffrn_detector_area_resol_mean 16.1048
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.877
_diffrn_measurement_device_type  'Xcalibur, Sapphire3'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0344
_diffrn_reflns_av_unetI/netI     0.0689
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.877
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            8151
_diffrn_reflns_point_group_measured_fraction_full 0.749
_diffrn_reflns_point_group_measured_fraction_max 0.634
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.988
_diffrn_reflns_theta_min         3.380
_diffrn_source                   'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.251
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.97919
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
'Fri Dec 12 05:27:49 2014'
;
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.360
_exptl_crystal_description       Parallelepiped
_exptl_crystal_F_000             1104
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.243
_refine_diff_density_min         -0.349
_refine_diff_density_rms         0.053
_refine_ls_abs_structure_details
;
 Flack x determined using 753 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.03(10)
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.970
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     343
_refine_ls_number_reflns         4347
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      0.970
_refine_ls_R_factor_all          0.0797
_refine_ls_R_factor_gt           0.0499
_refine_ls_shift/su_max          0.030
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0366P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0873
_refine_ls_wR_factor_ref         0.0959
_reflns_Friedel_coverage         0.412
_reflns_Friedel_fraction_full    0.487
_reflns_Friedel_fraction_max     0.380
_reflns_number_gt                3065
_reflns_number_total             4347
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            Exp_Form-I2FInHouse_Form-I_175K.cif
_cod_data_source_block           smz_f1_175
_cod_database_code               1547409
_shelx_estimated_absorpt_t_min   0.885
_shelx_estimated_absorpt_t_max   0.952
_shelxl_version_number           2014/6
_shelx_res_checksum              23501
_shelx_hkl_checksum              47451