#------------------------------------------------------------------------------
#$Date: 2025-08-23 00:12:46 +0300 (Sat, 23 Aug 2025) $
#$Revision: 301866 $
#$URL: file:///home/coder/svn-repositories/cod/cif/7/23/38/7233811.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_7233811
loop_
_publ_author_name
'Weizhao Cai'
'Jiangang He'
'Wei Li'
'Andrzej Katrusiak'
_publ_section_title
;
 Anomalous compression of a weakly CH...O bonded nonlinear optical
 molecular crystal
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              6471
_journal_page_last               6476
_journal_paper_doi               10.1039/C4TC00654B
_journal_volume                  2
_journal_year                    2014
_chemical_formula_moiety         'C6 H6 N2 O3'
_chemical_formula_sum            'C6 H6 N2 O3'
_chemical_formula_weight         154.13
_chemical_name_common            3-methyl-4-nitropyridineN-oxide
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   20.343(2)
_cell_length_b                   6.001(4)
_cell_length_c                   4.9855(17)
_cell_measurement_pressure       1580000
_cell_measurement_temperature    296(2)
_cell_volume                     608.6(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.247
_diffrn_measured_fraction_theta_max 0.247
_diffrn_measurement_device_type  'Oxford Diffraction Xcalibur Eos'
_diffrn_measurement_method
;HP omega scans - for more details see:
A. Budzianowski, A. Katrusiak in High-Pressure Crystallography
(Eds.: A. Katrusiak, P. F. McMillan),
Dordrecht: Kluwer Acad. Publ., 2004 pp.157-168
;
_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  0.0810
_diffrn_reflns_av_sigmaI/netI    0.0464
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       1
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            2243
_diffrn_reflns_theta_full        27.18
_diffrn_reflns_theta_max         27.18
_diffrn_reflns_theta_min         4.21
_exptl_absorpt_coefficient_mu    0.138
_exptl_absorpt_correction_T_max  0.9409
_exptl_absorpt_correction_T_min  0.5872
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
Katrusiak, A. (2003). REDSHABS - Program for correcting
reflections intensities for DAC absorption, gasket shadowing
and sample crystal absorption. Adam Mickiewicz University, Poznań.
Katrusiak, A. (2004). Z. Kristallogr. 219, 461-467
;
_exptl_crystal_colour            'light yellow'
_exptl_crystal_density_diffrn    1.682
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             320
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.066
_refine_diff_density_min         -0.067
_refine_diff_density_rms         0.019
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   3(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.072
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     100
_refine_ls_number_reflns         302
_refine_ls_number_restraints     70
_refine_ls_restrained_S_all      0.995
_refine_ls_R_factor_all          0.0397
_refine_ls_R_factor_gt           0.0312
_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/[σ²(Fo²)+(0.0330P)²+0.0000P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0560
_refine_ls_wR_factor_ref         0.0598
_reflns_number_gt                268
_reflns_number_total             302
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1000024.cif
_cod_data_source_block           PCOD1000024
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Orthorhombic' was changed
to 'orthorhombic' in accordance with the built-in table derived from
the CIF Core dictionary named 'cif_core.dic' version 2.4.5 last
updated on 2014-11-21.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_Hall     'P 2ac 2ab '
_cod_original_sg_symbol_H-M      ' P 21 21 21'
_cod_database_code               7233811
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x+1/2, -y, z+1/2'
'-x, y+1/2, -z+1/2'
'x+1/2, -y+1/2, -z'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_disorder_assembly
_atom_site_disorder_group
N1 N 0.15217(14) 0.057(2) 0.4954(8) 0.039(4) Uani 1 1 d DU . .
C1 C 0.17791(16) 0.182(3) 0.2958(8) 0.030(4) Uani 1 1 d DU . .
H1 H 0.2146 0.1273 0.2055 0.036 Uiso 1 1 calc R . .
C2 C 0.15269(15) 0.384(2) 0.2193(7) 0.029(4) Uani 1 1 d DU . .
C3 C 0.09664(16) 0.448(3) 0.3612(7) 0.028(4) Uani 1 1 d DU . .
C4 C 0.07018(18) 0.329(2) 0.5637(7) 0.026(4) Uani 1 1 d DU . .
H2 H 0.0328 0.3787 0.6523 0.031 Uiso 1 1 calc R . .
C5 C 0.09833(17) 0.140(3) 0.6332(8) 0.030(4) Uani 1 1 d DU . .
H3 H 0.0817 0.0601 0.7781 0.036 Uiso 1 1 calc R . .
O1 O 0.17848(14) -0.1352(19) 0.5534(6) 0.056(4) Uani 1 1 d U . .
C6 C 0.18871(14) 0.521(3) 0.0114(6) 0.034(4) Uani 1 1 d U . .
H4 H 0.2267 0.4407 -0.0497 0.051 Uiso 1 1 calc R . .
H5 H 0.2023 0.6598 0.0895 0.051 Uiso 1 1 calc R . .
H6 H 0.1600 0.5497 -0.1376 0.051 Uiso 1 1 calc R . .
N2 N 0.06271(15) 0.658(2) 0.2968(7) 0.033(4) Uani 1 1 d DU . .
O2 O 0.07558(10) 0.7552(16) 0.0846(5) 0.050(4) Uani 1 1 d U . .
O3 O 0.02045(11) 0.7249(16) 0.4508(4) 0.049(4) Uani 1 1 d U . .
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_23
_atom_site_aniso_U_13
_atom_site_aniso_U_12
N1 0.028(2) 0.038(13) 0.051(2) 0.009(5) -0.0158(19) -0.006(5)
C1 0.029(2) 0.023(13) 0.039(2) 0.009(5) 0.0016(18) -0.014(5)
C2 0.0288(18) 0.030(13) 0.028(2) -0.006(5) -0.0051(15) 0.010(5)
C3 0.0252(16) 0.024(13) 0.036(2) 0.012(5) -0.0093(17) 0.008(5)
C4 0.0285(19) 0.018(13) 0.031(2) 0.011(4) -0.0016(16) -0.009(5)
C5 0.0252(19) 0.030(13) 0.036(2) 0.003(5) -0.0047(16) -0.005(5)
O1 0.0484(19) 0.052(12) 0.069(2) 0.005(5) -0.0066(14) 0.022(4)
C6 0.0356(15) 0.030(13) 0.0362(16) 0.007(5) 0.0006(15) -0.014(4)
N2 0.0267(14) 0.031(12) 0.0421(18) -0.003(4) -0.0030(15) -0.007(4)
O2 0.0484(14) 0.045(12) 0.0565(16) 0.021(4) 0.0050(11) 0.012(3)
O3 0.0443(12) 0.052(12) 0.0509(13) 0.003(4) 0.0042(11) 0.019(4)
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
N N 0.0061 0.0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
O1 N1 C1 119.5(6) . .
O1 N1 C5 122.0(9) . .
C1 N1 C5 118.4(11) . .
N1 C1 C2 123.3(6) . .
C1 C2 C3 114.1(8) . .
C1 C2 C6 119.4(6) . .
C3 C2 C6 126.3(10) . .
C4 C3 C2 123.9(11) . .
C4 C3 N2 115.5(7) . .
C2 C3 N2 120.6(8) . .
C5 C4 C3 118.8(7) . .
C4 C5 N1 121.4(8) . .
O3 N2 O2 122.0(8) . .
O3 N2 C3 118.4(6) . .
O2 N2 C3 119.5(5) . .
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
N1 O1 1.306(16) .
N1 C1 1.349(11) .
N1 C5 1.384(10) .
C1 C2 1.373(17) .
C2 C3 1.397(7) .
C2 C6 1.513(11) .
C3 C4 1.350(11) .
C3 N2 1.469(17) .
C4 C5 1.32(2) .
N2 O3 1.221(5) .
N2 O2 1.237(7) .
loop_
_geom_torsion_atom_site_label_1
_geom_torsion_atom_site_label_2
_geom_torsion_atom_site_label_3
_geom_torsion_atom_site_label_4
_geom_torsion
_geom_torsion_site_symmetry_1
_geom_torsion_site_symmetry_2
_geom_torsion_site_symmetry_3
_geom_torsion_site_symmetry_4
O1 N1 C1 C2 179.0(8) . . . .
C5 N1 C1 C2 -1.2(10) . . . .
N1 C1 C2 C3 -1.7(11) . . . .
N1 C1 C2 C6 174.2(5) . . . .
C1 C2 C3 C4 2.4(11) . . . .
C6 C2 C3 C4 -173.1(7) . . . .
C1 C2 C3 N2 -178.1(7) . . . .
C6 C2 C3 N2 6.3(10) . . . .
C2 C3 C4 C5 -0.1(13) . . . .
N2 C3 C4 C5 -179.6(8) . . . .
C3 C4 C5 N1 -3.1(14) . . . .
O1 N1 C5 C4 -176.4(9) . . . .
C1 N1 C5 C4 3.7(12) . . . .
C4 C3 N2 O3 10.7(10) . . . .
C2 C3 N2 O3 -168.8(6) . . . .
C4 C3 N2 O2 -166.2(6) . . . .
C2 C3 N2 O2 14.2(10) . . . .
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 PubChem 70633
