A new polymorph and two pseudopolymorphs of pyrimethamine
Tutughamiarso, Maya; Bolte, Michael; Acta Crystallographica Section C 67 (2011) o428–o434; doi:10.1107/S0108270111038868

data_2018303
_publ_section_title
;
 A new polymorph and two pseudopolymorphs of pyrimethamine
;
_journal_coeditor_code           SK3416
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o428
_journal_page_last               o434
_journal_paper_doi               10.1107/S0108270111038868
_journal_volume                  67
_journal_year                    2011
_chemical_formula_iupac          'C22 H27 Cl N6 O2'
_chemical_formula_moiety         'C22 H27 Cl N6 O2'
_chemical_formula_sum            'C22 H27 Cl N6 O2'
_chemical_formula_weight         442.95
_chemical_name_systematic
;
5,5'-(5-(4-chlorophenyl)-6-ethylpyrimidine-2,4-diyl)bis(azanediyl)bis(1-
methylpyrrolidin-2-one)
;
_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           SHELXL97
_cell_angle_alpha                95.363(7)
_cell_angle_beta                 92.435(7)
_cell_angle_gamma                93.783(7)
_cell_formula_units_Z            2
_cell_length_a                   6.7742(6)
_cell_length_b                   9.2265(8)
_cell_length_c                   17.3345(15)
_cell_measurement_reflns_used    5506
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.96
_cell_measurement_theta_min      3.30
_cell_volume                     1075.06(16)
_computing_cell_refinement       'X-AREA (Stoe & Cie, 2001)'
_computing_data_collection       'X-AREA (Stoe & Cie, 2001)'
_computing_data_reduction        'X-AREA (Stoe & Cie, 2001)'
_computing_molecular_graphics
;
Mercury (Version 2.2; Macrae <i>et al.</i>, 2008) and XP (Sheldrick,
2008)
;
_computing_publication_material  'publCIF (Westrip, 2010)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Stoe IPDS II two-circle'
_diffrn_measurement_method       \w
_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  0.1153
_diffrn_reflns_av_sigmaI/netI    0.1049
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            15311
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         3.29
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.210
_exptl_absorpt_correction_T_max  0.9793
_exptl_absorpt_correction_T_min  0.9021
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '[MULABS (Spek, 2009; Blessing, 1995)]'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.368
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             468
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.970
_refine_diff_density_min         -0.340
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.896
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     288
_refine_ls_number_reflns         3776
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.896
_refine_ls_R_factor_all          0.1026
_refine_ls_R_factor_gt           0.0613
_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^)+(0.0864P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1461
_refine_ls_wR_factor_ref         0.1607
_reflns_number_gt                2262
_reflns_number_total             3776
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk3416.cif
_cod_data_source_block           II
_cod_database_code               2018303
_cod_database_fobs_code          2018303