Cocrystals of 5-fluorocytosine. I. Coformers with fixed hydrogen-bonding sites
Tutughamiarso, Maya; Wagner, Guido; Egert, Ernst; Acta Crystallographica Section B 68 (2012) 431–443; doi:10.1107/S010876811202561X

data_2105156
_publ_section_title
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 Cocrystals of 5-fluorocytosine. I. Coformers with fixed hydrogen-bonding
 sites
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_journal_coeditor_code           GP5052
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              431
_journal_page_last               443
_journal_paper_doi               10.1107/S010876811202561X
_journal_volume                  68
_journal_year                    2012
_chemical_formula_moiety         'C4 H4 F N3 O, C4 H5 N3'
_chemical_formula_sum            'C8 H9 F N6 O'
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_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
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_cell_angle_beta                 101.944(16)
_cell_angle_gamma                91.700(18)
_cell_formula_units_Z            2
_cell_length_a                   6.2414(12)
_cell_length_b                   7.2335(17)
_cell_length_c                   11.546(2)
_cell_measurement_reflns_used    2478
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.73
_cell_measurement_theta_min      3.45
_cell_volume                     489.76(18)
_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 et al., 2008) and XP (Sheldrick, 2008);'
_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 0.989
_diffrn_measurement_device_type  'STOE IPDS II two-circle-diffractometer'
_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  0.1379
_diffrn_reflns_av_sigmaI/netI    0.0991
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            4298
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.61
_diffrn_reflns_theta_min         3.46
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.122
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.520
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             232
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.318
_refine_diff_density_min         -0.379
_refine_ls_extinction_coef       0.058(18)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.947
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     161
_refine_ls_number_reflns         1834
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      0.946
_refine_ls_R_factor_all          0.0955
_refine_ls_R_factor_gt           0.0720
_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^)+(0.1395P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1879
_refine_ls_wR_factor_ref         0.2098
_reflns_number_gt                1246
_reflns_number_total             1834
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            gp5052.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
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_cod_original_cell_volume        489.76(17)
_cod_database_code               2105156