The observed and energetically feasible crystal structures of 5-substituted uracils
Barnett, Sarah A.; Hulme, Ashley T.; Issa, Nizar; Lewis, Thomas C.; Price, Louise S.; Tocher, Derek A.; Price, Sarah L.; New Journal of Chemistry 32 (2008) 1761–; doi:10.1039/b806763e

data_7052013
_publ_section_title
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 The observed and energetically feasible crystal structures of
 5-substituted uracils
;
_journal_issue                   10
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              1761
_journal_paper_doi               10.1039/b806763e
_journal_volume                  32
_journal_year                    2008
_chemical_formula_moiety         'C4 H3 Cl N2 O2'
_chemical_formula_sum            'C4 H3 Cl N2 O2'
_chemical_formula_weight         146.53
_chemical_name_systematic
;
5-Chlorouracil
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 104.201(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.4393(10)
_cell_length_b                   6.8412(8)
_cell_length_c                   9.3679(12)
_cell_measurement_reflns_used    2448
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.231
_cell_measurement_theta_min      2.914
_cell_volume                     524.33(11)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.949
_diffrn_measurement_device_type  'Bruker SMART APEX diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_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  0.0163
_diffrn_reflns_av_sigmaI/netI    0.0215
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            4328
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.23
_diffrn_reflns_theta_min         2.91
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.633
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8632
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS v2.03'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.856
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             296
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.404
_refine_diff_density_min         -0.696
_refine_diff_density_rms         0.082
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     109
_refine_ls_number_reflns         1234
_refine_ls_number_restraints     96
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0350
_refine_ls_R_factor_gt           0.0330
_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^)+(0.0583P)^2^+0.1791P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0920
_refine_ls_wR_factor_ref         0.0941
_reflns_number_gt                1131
_reflns_number_total             1234
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b806763e.txt
_cod_data_source_block           STR0454
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7052013