Cocrystals of 6-chlorouracil and 6-chloro-3-methyluracil: exploring their hydrogen-bond-based synthon motifs with several triazine and pyrimidine derivatives
Gerhardt, Valeska; Egert, Ernst; Acta Crystallographica Section B 71 (2015) 209–220; doi:10.1107/S2052520615003790

data_2106016
_publ_section_title
;
 Cocrystals of 6-chlorouracil and 6-chloro-3-methyluracil: exploring their
 hydrogen-bond-based synthon motifs with several triazine and pyrimidine
 derivatives
;
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              209
_journal_page_last               220
_journal_paper_doi               10.1107/S2052520615003790
_journal_volume                  71
_journal_year                    2015
_chemical_formula_moiety         'C4 H3 Cl N2 O2, C3 H4 Cl N5, C3 H7 N O'
_chemical_formula_sum            'C10 H14 Cl2 N8 O3'
_chemical_formula_weight         365.19
_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           SHELXL-97
_cell_angle_alpha                72.144(8)
_cell_angle_beta                 77.879(9)
_cell_angle_gamma                77.444(9)
_cell_formula_units_Z            2
_cell_length_a                   8.4573(10)
_cell_length_b                   9.3488(10)
_cell_length_c                   10.8269(11)
_cell_measurement_reflns_used    11913
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.25
_cell_measurement_theta_min      3.43
_cell_volume                     785.79(15)
_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 3.1, Macrae et al., 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 0.984
_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  0.0652
_diffrn_reflns_av_sigmaI/netI    0.0460
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            17138
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.94
_diffrn_reflns_theta_min         3.43
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.441
_exptl_absorpt_correction_T_max  0.9830
_exptl_absorpt_correction_T_min  0.8492
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'X-Area (Stoe & Cie, 2001)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.543
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             376
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.449
_refine_diff_density_min         -0.178
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.981
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     228
_refine_ls_number_reflns         3027
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      0.981
_refine_ls_R_factor_all          0.0622
_refine_ls_R_factor_gt           0.0377
_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^)+(0.0418P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0760
_refine_ls_wR_factor_ref         0.0827
_reflns_number_gt                2270
_reflns_number_total             3027
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ao5001sup1.cif
_cod_data_source_block           Va
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               2106016
_cod_database_fobs_code          2106016