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_1547420
_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                   14.47950(10)
_cell_length_b                   8.19740(10)
_cell_length_c                   21.8693(3)
_cell_measurement_reflns_used    11252
_cell_measurement_temperature    220
_cell_measurement_theta_max      29.4970
_cell_measurement_theta_min      1.8030
_cell_volume                     2595.76(5)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.35 (release 13-08-2014 CrysAlis171 .NET)
(compiled Aug 13 2014,18:06:01)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.35 (release 13-08-2014 CrysAlis171 .NET)
(compiled Aug 13 2014,18:06:01)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.35 (release 13-08-2014 CrysAlis171 .NET)
(compiled Aug 13 2014,18:06:01)
;
_computing_molecular_graphics    OSCAIL
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    SHELXT
_diffrn_ambient_temperature      220
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       'CrystalLogic Kappa (3 circle)'
_diffrn_measurement_device_type  'Rigaku Saturn724+ (2x2 bin mode)'
_diffrn_measurement_method
;
omega rotation with 1 degree frames
;
_diffrn_measurement_specimen_support 'MiTeGen loop'
_diffrn_radiation_monochromator  'double crystal Silicon 111'
_diffrn_radiation_source         'Diamond Light Source Beamline I19'
_diffrn_radiation_type           Synchrotron
_diffrn_radiation_wavelength     0.68890
_diffrn_reflns_av_R_equivalents  0.0448
_diffrn_reflns_av_unetI/netI     0.0432
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            23478
_diffrn_reflns_point_group_measured_fraction_full 0.988
_diffrn_reflns_point_group_measured_fraction_max 0.968
_diffrn_reflns_theta_full        24.415
_diffrn_reflns_theta_max         29.476
_diffrn_reflns_theta_min         1.805
_exptl_absorpt_coefficient_mu    0.249
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.97856
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.353
_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         0.293
_refine_diff_density_min         -0.324
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details
;
 Flack x determined using 2364 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.01(5)
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     344
_refine_ls_number_reflns         7666
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0595
_refine_ls_R_factor_gt           0.0453
_refine_ls_shift/su_max          0.029
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0541P)^2^+0.3587P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1081
_refine_ls_wR_factor_ref         0.1195
_reflns_Friedel_coverage         0.895
_reflns_Friedel_fraction_full    0.978
_reflns_Friedel_fraction_max     0.936
_reflns_number_gt                6189
_reflns_number_total             7666
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            Exp_Form-I2FSynchrotron_Form-I_220K.cif
_cod_data_source_block           220k_smz-f1_a
_cod_database_code               1547420
_shelx_estimated_absorpt_t_min   0.885
_shelx_estimated_absorpt_t_max   0.952
_shelx_res_checksum              92026
_shelx_hkl_checksum              83722