New pseudopolymorphs of 5-fluorocytosine
Tutughamiarso, Maya; Bolte, Michael; Egert, Ernst; Acta Crystallographica Section C 65 (2009) o574–o578; doi:10.1107/S010827010903950X

data_2017403
_publ_section_title
;
 New pseudopolymorphs of 5-fluorocytosine
;
_journal_coeditor_code           SK3347
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o574
_journal_page_last               o578
_journal_paper_doi               10.1107/S010827010903950X
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C4 H4 F N3 O , C2 H6 O S'
_chemical_formula_moiety         'C4 H4 F N3 O , C2 H6 O S'
_chemical_formula_sum            'C6 H10 F N3 O2 S'
_chemical_formula_weight         207.23
_chemical_name_common
;
5-fluorocytosine dimethyl sulfoxide solvate
;
_chemical_name_systematic
;
4-amino-5-fluoropyrimidin-2(1<i>H</i>)-one dimethyl sulfoxide solvate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 107.065(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.4467(12)
_cell_length_b                   9.1849(8)
_cell_length_c                   8.5635(8)
_cell_measurement_reflns_used    6720
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.61
_cell_measurement_theta_min      4.01
_cell_volume                     935.89(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, 2009)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.992
_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  0.0492
_diffrn_reflns_av_sigmaI/netI    0.0329
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            8061
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         4.07
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.334
_exptl_absorpt_correction_T_max  0.9835
_exptl_absorpt_correction_T_min  0.9034
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '[MULABS (Spek, 2009; Blessing, 1995)]'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.471
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             432
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.255
_refine_diff_density_min         -0.272
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     132
_refine_ls_number_reflns         1904
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0546
_refine_ls_R_factor_gt           0.0391
_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^)+(0.0576P)^2^+0.0842P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0931
_refine_ls_wR_factor_ref         0.0995
_reflns_number_gt                1509
_reflns_number_total             1904
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk3347.cif
_cod_data_source_block           I
_cod_original_cell_volume        935.89(15)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2017403
_cod_database_fobs_code          2017403