Ammonium 2,6-dicarboxyl-4-nitrophenol
Sun, Yu-Xi; Nie, Yi; Acta Crystallographica, Section E 60 (2004) m1742–m1744; doi:10.1107/S1600536804022135

data_2204393
_publ_section_title
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Ammonium 2,6-dicarboxyl-4-nitrophenol
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_journal_issue                   10
_journal_name_full               'Acta Crystallographica, Section E'
_journal_page_first              m1742
_journal_page_last               m1744
_journal_paper_doi               10.1107/S1600536804022135
_journal_volume                  60
_journal_year                    2004
_chemical_formula_moiety         'C8 H4 N O7, H4 N'
_chemical_formula_sum            'C8 H8 N2 O7'
_chemical_formula_weight         244.16
_chemical_name_systematic
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 ?
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_space_group_IT_number           73
_space_group_name_Hall           '-I 2b 2c'
_space_group_name_H-M_alt        'I b c a'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-I 2b 2c'
_symmetry_space_group_name_H-M   'I b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   7.128(3)
_cell_length_b                   13.460(3)
_cell_length_c                   19.731(5)
_cell_measurement_reflns_used    872
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.735
_cell_measurement_theta_min      2.312
_cell_volume                     1893.1(8)
_computing_cell_refinement       'SAINT (Bruker, 1998)'
_computing_data_collection       'SMART (Bruker, 1998)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1997b)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997a)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997a)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       '\w scans'
_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  0.0236
_diffrn_reflns_av_sigmaI/netI    0.0171
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            5300
_diffrn_reflns_theta_full        26.99
_diffrn_reflns_theta_max         26.99
_diffrn_reflns_theta_min         2.06
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.154
_exptl_absorpt_correction_T_max  0.9626
_exptl_absorpt_correction_T_min  0.9482
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.713
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1008
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.554
_refine_diff_density_min         -0.515
_refine_ls_extinction_coef       0.006(2)
_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   1.119
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     92
_refine_ls_number_reflns         1038
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.118
_refine_ls_R_factor_all          0.0636
_refine_ls_R_factor_gt           0.0587
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         <0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.1170P)^2^+2.7596P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1909
_refine_ls_wR_factor_ref         0.1970
_reflns_number_gt                919
_reflns_number_total             1038
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            su6140.cif
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 
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_cod_database_code               2204393