Pseudopolymorphs of 3,5-dinitrosalicylic acid
Senthil Kumar, V. S.; Kuduva, Srinivasan S.; Desiraju, Gautam R.; Journal of the Chemical Society, Perkin Transactions 2  (1999) 1069–; doi:10.1039/a902134e

data_7213056
_publ_section_title
;
 Pseudopolymorphs of 3,5-dinitrosalicylic acid
;
_journal_issue                   6
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 2'
_journal_page_first              1069
_journal_paper_doi               10.1039/a902134e
_journal_year                    1999
_chemical_formula_moiety         'C7 H4 N2 O7 . C2 H4 O2'
_chemical_formula_sum            'C9 H8 N2 O8'
_chemical_formula_weight         272.17
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                78.99(3)
_cell_angle_beta                 73.84(5)
_cell_angle_gamma                85.86(5)
_cell_formula_units_Z            2
_cell_length_a                   6.006(4)
_cell_length_b                   9.517(4)
_cell_length_c                   10.396(5)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12
_cell_measurement_theta_min      8
_cell_volume                     560.1(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.975
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0438
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            1924
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         2.07
_diffrn_standards_decay_%        18
_diffrn_standards_interval_time  '90 minutes'
_exptl_absorpt_coefficient_mu    0.146
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.614
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             280
_refine_diff_density_max         0.193
_refine_diff_density_min         -0.198
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.991
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     178
_refine_ls_number_reflns         1924
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.991
_refine_ls_R_factor_all          0.1331
_refine_ls_R_factor_gt           0.0578
_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^)+(0.0947P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1469
_refine_ls_wR_factor_ref         0.1766
_reflns_number_gt                932
_reflns_number_total             1924
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            902134esup1.cif
_cod_data_source_block           Form_A
_cod_depositor_comments
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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 

The following automatic conversions were performed:

data name '_atom_site_symmetry_multiplicit' was replaced with
'_atom_site_symmetry_multiplicity' as specified in the replacement
file 'data/replacement-values/replacement_tags.lst'.

Automatic conversion script
Id: cif_correct_tags 9268 2022-04-12 08:56:07Z antanas 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7213056