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_1547446
_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_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           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
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_cell_angle_gamma                90
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CrysAlisPro, Agilent Technologies,
Version 1.171.37.34 (release 22-05-2014 CrysAlis171 .NET)
(compiled May 22 2014,16:03:01)
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CrysAlisPro, Agilent Technologies,
Version 1.171.37.34 (release 22-05-2014 CrysAlis171 .NET)
(compiled May 22 2014,16:03:01)
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CrysAlisPro, Agilent Technologies,
Version 1.171.37.34 (release 22-05-2014 CrysAlis171 .NET)
(compiled May 22 2014,16:03:01)
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_computing_molecular_graphics    OSCAIL
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_diffrn_ambient_temperature      240
_diffrn_measured_fraction_theta_full 0.990
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;
omega rotation with 1 degree frames
;
_diffrn_measurement_specimen_support 'MiTeGen loop'
_diffrn_radiation_monochromator  'double crystal Silicon 111'
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_diffrn_radiation_type           Synchrotron
_diffrn_radiation_wavelength     0.68890
_diffrn_reflns_av_R_equivalents  0.0657
_diffrn_reflns_av_unetI/netI     0.0408
_diffrn_reflns_Laue_measured_fraction_full 0.990
_diffrn_reflns_Laue_measured_fraction_max 0.973
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -16
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_diffrn_reflns_limit_l_min       -31
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_diffrn_reflns_point_group_measured_fraction_max 0.973
_diffrn_reflns_theta_full        24.415
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_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.95866
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CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
Empirical absorption correction using spherical harmonics,
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;
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.445
_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         0.329
_refine_diff_density_min         -0.420
_refine_diff_density_rms         0.059
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
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_refine_ls_matrix_type           full
_refine_ls_number_parameters     176
_refine_ls_number_reflns         3601
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.971
_refine_ls_R_factor_all          0.0720
_refine_ls_R_factor_gt           0.0482
_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^)+(0.0463P)^2^+1.4827P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1087
_refine_ls_wR_factor_ref         0.1244
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                2586
_reflns_number_total             3601
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            Exp_Form-II2FSynchrotron_Form-II_240K.cif
_cod_data_source_block           240k_smz-f2_a
_cod_database_code               1547446
_shelx_estimated_absorpt_t_min   0.878
_shelx_estimated_absorpt_t_max   0.949
_shelx_res_checksum              85206
_shelx_hkl_checksum              44173