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_7213061
_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 . C4 H10 O'
_chemical_formula_sum            'C11 H14 N2 O8'
_chemical_formula_weight         302.24
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_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            4
_cell_length_a                   10.290(4)
_cell_length_b                   5.972(3)
_cell_length_c                   22.928(7)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12
_cell_measurement_theta_min      8
_cell_volume                     1409.0(10)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0273
_diffrn_reflns_av_sigmaI/netI    0.0375
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            3454
_diffrn_reflns_theta_full        27.97
_diffrn_reflns_theta_max         27.97
_diffrn_reflns_theta_min         1.78
_diffrn_standards_decay_%        6
_diffrn_standards_interval_time  90
_exptl_absorpt_coefficient_mu    0.123
_exptl_crystal_density_diffrn    1.425
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             632
_refine_diff_density_max         0.198
_refine_diff_density_min         -0.225
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.984
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     181
_refine_ls_number_reflns         1738
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.984
_refine_ls_R_factor_all          0.0923
_refine_ls_R_factor_gt           0.0499
_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^)+(0.0768P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1191
_refine_ls_wR_factor_ref         0.1360
_reflns_number_gt                1082
_reflns_number_total             1738
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            902134esup1.cif
_cod_data_source_block           Form_G
_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 2.4.2 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_cell_volume        1409.1(10)
_cod_original_sg_symbol_H-M      Pca21
_cod_database_code               7213061