Thierry Maris; Personal communication to COD  (2020) –; doi:

data_3500111
_publ_section_references
;
Dolomanov, O.V., Bourhis, L.J., Gildea, R.J, Howard, J.A.K. & Puschmann, H.
 (2009), J. Appl. Cryst. 42, 339-341.

Sheldrick, G.M. (2015). Acta Cryst. A71, 3-8.

Sheldrick, G.M. (2015). Acta Cryst. C71, 3-8.
;
_journal_name_full               'Personal communication to COD'
_journal_year                    2020
_chemical_formula_moiety         'C5 H4 N2 O3'
_chemical_formula_sum            'C5 H4 N2 O3'
_chemical_formula_weight         140.10
_chemical_name_common            '3-Pyridinol, 2-Nitro-'
_chemical_name_systematic        '3-Pyridinol, 2-Nitro-'
_space_group_crystal_system      orthorhombic
_space_group_IT_number           56
_space_group_name_Hall           '-P 2ab 2ac'
_space_group_name_H-M_alt        'P c c n'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     dual
_audit_creation_date             2017-06-02
_audit_creation_method
;
Olex2 1.2
(compiled 2017.03.28 svn.r3405 for OlexSys, GUI svn.r5337)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   12.5532(5)
_cell_length_b                   7.4371(3)
_cell_length_c                   11.9865(5)
_cell_measurement_reflns_used    9229
_cell_measurement_temperature    150
_cell_measurement_theta_max      60.584
_cell_measurement_theta_min      3.063
_cell_volume                     1119.05(8)
_computing_cell_refinement
;
SAINT (2013) V8.38A; Integration Software for Single Crystal Data. 
Bruker AXS Inc., Madison, WI 53719-1173.
;
_computing_data_collection
;
APEX 2 (2013) Bruker AXS Inc., Madison, WI 53719-1173.
;
_computing_data_reduction
;
SAINT (2013) V8.38A; Integration Software for Single Crystal Data. 
Bruker AXS Inc., Madison, WI 53719-1173.
;
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'XT (Sheldrick, 2015)'
_diffrn_ambient_temperature      150
_diffrn_detector                 'CMOS Area detector'
_diffrn_detector_area_resol_mean 10.24
_diffrn_detector_type            'Bruker Photon 100 CMOS Detector'
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.973
_diffrn_measurement_device       'k-geometry diffractometer'
_diffrn_measurement_device_type  'Bruker Venture Metaljet'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_collimation    'Focusing mirrors'
_diffrn_radiation_monochromator  'Helios MX Mirror Optics'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           GaK\a
_diffrn_radiation_wavelength     1.34139
_diffrn_reflns_av_R_equivalents  0.0320
_diffrn_reflns_av_unetI/netI     0.0214
_diffrn_reflns_Laue_measured_fraction_full 0.982
_diffrn_reflns_Laue_measured_fraction_max 0.973
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            9685
_diffrn_reflns_point_group_measured_fraction_full 0.982
_diffrn_reflns_point_group_measured_fraction_max 0.973
_diffrn_reflns_theta_full        53.594
_diffrn_reflns_theta_max         60.552
_diffrn_reflns_theta_min         6.017
_diffrn_source                   'Metal Jet'
_diffrn_source_target            Ga
_diffrn_source_type              'Gallium Liquid Metal Jet Source'
_exptl_absorpt_coefficient_mu    0.782
_exptl_absorpt_correction_T_max  0.7519
_exptl_absorpt_correction_T_min  0.6627
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. 
wR2(int) was 0.1193 before and 0.0570 after correction. 
The Ratio of minimum to maximum transmission is 0.8814. 
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'clear light yellow'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.663
_exptl_crystal_description       Block
_exptl_crystal_F_000             576
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.08
_exptl_special_details
;
X-ray crystallographic data for I were collected from a single crystal
sample, which was mounted on a loop fiber. Data were collected using
a Bruker Venture diffractometer equipped with a Photon 100 CMOS Detector,
a Helios MX optics and a Kappa goniometer. The crystal-to-detector distance 
was 4.0 cm, and the data collection was carried out in 1024 x 1024 pixel mode.
;
_geom_special_details
;
 All esds (except the esd in the dihedral angle between two l.s. planes)
 are estimated using the full covariance matrix.  The cell esds are taken
 into account individually in the estimation of esds in distances, angles
 and torsion angles; correlations between esds in cell parameters are only
 used when they are defined by crystal symmetry.  An approximate (isotropic)
 treatment of cell esds is used for estimating esds involving l.s. planes.
;
_refine_diff_density_max         0.415
_refine_diff_density_min         -0.445
_refine_diff_density_rms         0.125
_refine_ls_extinction_coef       0.069(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2016/6 (Sheldrick 2016)'
_refine_ls_goodness_of_fit_ref   1.169
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     115
_refine_ls_number_reflns         1258
_refine_ls_number_restraints     24
_refine_ls_restrained_S_all      1.194
_refine_ls_R_factor_all          0.0520
_refine_ls_R_factor_gt           0.0502
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0640P)^2^+0.6676P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1237
_refine_ls_wR_factor_ref         0.1257
_refine_special_details
;
_shelx_SHELXL_version_number      2016/6

1. Uiso/Uaniso restraints and constraints
Uanis(O1) \\sim Ueq, Uanis(O1A) \\sim Ueq, Uanis(O2) \\sim Ueq, Uanis(O2A)
\\sim Ueq: with sigma of 0.001 and sigma for terminal atoms of 0.002
Uanis(O2) = Uanis(O2A)
Uanis(O1) = Uanis(O1A)
2. Others
 Sof(O1A)=Sof(O2A)=1-FVAR(1)
 Sof(O2)=Sof(O1)=FVAR(1)
;
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                1172
_reflns_number_total             1258
_reflns_special_details
;
 Reflections were merged by SHELXL according to the crystal
 class for the calculation of statistics and refinement.
 
 _reflns_Friedel_fraction is defined as the number of unique
 Friedel pairs measured divided by the number that would be
 possible theoretically, ignoring centric projections and
 systematic absences.
;
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            t0507.cif
_cod_data_source_block           t0507
_cod_database_code               3500111
_cod_database_fobs_code 3500111