Supramolecular association in proton-transfer adducts containing benzamidinium cations. I. Four molecular salts with uracil derivatives
Portalone, Gustavo; Acta Crystallographica Section C 66 (2010) o295–o301; doi:10.1107/S0108270110016252

data_2017668
_publ_section_title
;
 Supramolecular association in proton-transfer adducts containing
 benzamidinium cations. I. Four molecular salts with uracil derivatives
;
_journal_coeditor_code           FN3053
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o295
_journal_page_last               o301
_journal_paper_doi               10.1107/S0108270110016252
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C7 H9 N2 + , C4 H2 N3 O5 - , 2H2 O'
_chemical_formula_moiety         'C7 H9 N2 + , C4 H2 N3 O5 - , 2H2 O'
_chemical_formula_sum            'C11 H15 N5 O7'
_chemical_formula_weight         329.28
_chemical_name_common
;
benzamidinium diliturate dihydrate
;
_chemical_name_systematic
;
benzamidinium 5-nitro-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-olate dihydrate
;
_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           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 98.2485(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.7607(3)
_cell_length_b                   5.0998(2)
_cell_length_c                   27.2412(5)
_cell_measurement_reflns_used    109123
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      32.6648
_cell_measurement_theta_min      2.9968
_cell_volume                     1479.46(8)
_computing_cell_refinement       'CrysAlis RED (Oxford Diffraction, 2006)'
_computing_data_collection       'CrysAlis CCD (Oxford Diffraction, 2006)'
_computing_data_reduction        'CrysAlis RED (Oxford Diffraction, 2006)'
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR97 (Altomare <i>et al.</i>,  1999)'
_diffrn_ambient_temperature      298(2)
_diffrn_detector_area_resol_mean 16.0696
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Oxford Xcalibur S CCD area-detector'
_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     0.71070
_diffrn_reflns_av_R_equivalents  0.0341
_diffrn_reflns_av_sigmaI/netI    0.0100
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       40
_diffrn_reflns_limit_l_min       -40
_diffrn_reflns_number            306312
_diffrn_reflns_theta_full        32.00
_diffrn_reflns_theta_max         32.00
_diffrn_reflns_theta_min         3.02
_exptl_absorpt_coefficient_mu    0.125
_exptl_absorpt_correction_T_max  0.99102
_exptl_absorpt_correction_T_min  0.90782
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
[CrysAlis RED (Oxford Diffraction, 2006); empirical absorption
correction
using spherical harmonics implemented in the SCALE3 ABSPACK scaling algorithm]
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.478
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       tablet
_exptl_crystal_F_000             688
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.399
_refine_diff_density_min         -0.244
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.172
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     248
_refine_ls_number_reflns         5116
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.172
_refine_ls_R_factor_all          0.0748
_refine_ls_R_factor_gt           0.0642
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0635P)^2^+0.6910P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1598
_refine_ls_wR_factor_ref         0.1654
_reflns_number_gt                4542
_reflns_number_total             5116
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fn3053.cif
_cod_data_source_block           III
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2017668
_cod_database_fobs_code          2017668