Solid-phase molecular recognition of cytosine based on proton-transfer reaction. Part II. supramolecular architecture in the cocrystals of cytosine and its 5-Fluoroderivative with 5-Nitrouracil
Gustavo Portalone; Chemistry Central Journal 5 (2011) 51–; doi:10.1186/1752-153X-5-51

data_1547214
_publ_section_title
;
 Solid-phase molecular recognition of cytosine based on proton-transfer
 reaction. Part II. supramolecular architecture in the cocrystals of
 cytosine and its 5-Fluoroderivative with 5-Nitrouracil
;
_journal_name_full               'Chemistry Central Journal'
_journal_page_first              51
_journal_paper_doi               10.1186/1752-153X-5-51
_journal_volume                  5
_journal_year                    2011
_chemical_formula_moiety         'C4 H3 N3 O4, C4 H4 F N3 O, 2(H2 O)'
_chemical_formula_sum            'C8 H11 F N6 O7'
_chemical_formula_weight         322.23
_space_group_IT_number           9
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 111.293(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.2066(6)
_cell_length_b                   28.2758(11)
_cell_length_c                   4.7187(3)
_cell_measurement_reflns_used    15120
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      32.4578
_cell_measurement_theta_min      2.8615
_cell_volume                     1268.85(13)
_computing_cell_refinement       'CrysAlis RED (Oxford Diffraction, 2006)'
_computing_data_collection       'CrysAlis CCD (Oxford Diffraction, 2006)'
_computing_data_reduction        'CrysAlis RED '
_computing_molecular_graphics    'WinGX (Farrugia, 1997)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR97 (Altomare et al., 1999)'
_diffrn_ambient_temperature      298(2)
_diffrn_detector_area_resol_mean 16.0696
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Oxford Diffraction Xcalibur S CCD'
_diffrn_measurement_method       '\w and \f'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0496
_diffrn_reflns_av_sigmaI/netI    0.0164
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       34
_diffrn_reflns_limit_k_min       -34
_diffrn_reflns_limit_l_max       5
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            39739
_diffrn_reflns_theta_full        25.95
_diffrn_reflns_theta_max         25.95
_diffrn_reflns_theta_min         2.88
_exptl_absorpt_coefficient_mu    0.156
_exptl_absorpt_correction_T_max  0.9953
_exptl_absorpt_correction_T_min  0.9770
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.32.29 (release 10-06-2008 CrysAlis171 .NET)
(compiled Jun 10 2008,16:49:55)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.687
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       tablets
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.254
_refine_diff_density_min         -0.279
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.473
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     229
_refine_ls_number_reflns         1246
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.469
_refine_ls_R_factor_all          0.0680
_refine_ls_R_factor_gt           0.0670
_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^)+(0.0550P)^2^+1.9472P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1533
_refine_ls_wR_factor_ref         0.1535
_reflns_number_gt                1230
_reflns_number_total             1246
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            13065_2011_315_MOESM2_ESM.CIF
_cod_data_source_block           1
_cod_original_cell_volume        1268.85(12)
_cod_original_sg_symbol_H-M      'C c'
_cod_database_code               1547214