N—H···S and N—H···O hydrogen bonds: `pure' and `mixed' <i>R</i>^2^~2~(8) patterns in the crystal structures of eight 2-thiouracil derivatives
Hützler, Wilhelm Maximilian; Egert, Ernst; Acta Crystallographica Section C 70 (2014) 241–249; doi:10.1107/S2053229614001387

data_2019374
_publ_section_title
;
 N---H&#x00B7;&#x00B7;&#x00B7;S and N---H&#x00B7;&#x00B7;&#x00B7;O
 hydrogen bonds: `pure' and `mixed' <i>R</i>^2^~2~(8) patterns in the
 crystal structures of eight 2-thiouracil derivatives
;
_journal_coeditor_code           EG3147
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              241
_journal_page_last               249
_journal_paper_doi               10.1107/S2053229614001387
_journal_volume                  70
_journal_year                    2014
_chemical_formula_iupac          'C5 H6 N2 O2 S, C4 H9 N O'
_chemical_formula_moiety         'C5 H6 N2 O2 S, C4 H9 N O'
_chemical_formula_sum            'C9 H15 N3 O3 S'
_chemical_formula_weight         245.30
_chemical_name_systematic
;
5-Methoxy-2-thiouracil--dimethylacetamide (1/1)
;
_space_group_IT_number           11
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yb'
_symmetry_space_group_name_H-M   'P 1 21/m 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 97.170(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.225(3)
_cell_length_b                   6.4726(8)
_cell_length_c                   13.867(3)
_cell_measurement_reflns_used    6964
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.27
_cell_measurement_theta_min      3.27
_cell_volume                     1177.7(4)
_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 (Macrae <i>et al.</i>, 2008) and XP in SHELXTL-Plus (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 0.995
_diffrn_measured_fraction_theta_max 0.978
_diffrn_measurement_device_type  'Stoe IPDS II two-circle-diffractometer'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'Genix 3D multilayer optics'
_diffrn_radiation_source         'Genix 3D I\mS microfocus X-ray source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1157
_diffrn_reflns_av_sigmaI/netI    0.0840
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            9319
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         3.27
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.272
_exptl_absorpt_correction_T_max  0.9681
_exptl_absorpt_correction_T_min  0.9228
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(X-AREA; Stoe & Cie, 2001)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.383
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             520
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.495
_refine_diff_density_min         -0.421
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.115
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         2470
_refine_ls_number_restraints     260
_refine_ls_restrained_S_all      1.166
_refine_ls_R_factor_all          0.1152
_refine_ls_R_factor_gt           0.0766
_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^)+(0.0805P)^2^+1.0888P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1736
_refine_ls_wR_factor_ref         0.1901
_reflns_number_gt                1767
_reflns_number_total             2470
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            eg3147sup1.cif
_cod_data_source_block           IIa
_cod_original_sg_symbol_H-M      'P 21/m'
_cod_database_code               2019374