#------------------------------------------------------------------------------
#$Date: 2020-02-01 06:52:50 +0100 (Sat 01 de Feb de 2020) $
#$Revision: 247437 $
#$URL: svn://www.crystallography.net/cod/cif/2/02/19/2021969.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_2021969
loop_
_publ_author_name
'Rajendrakumar, Satyasree'
'Durga, Anuja Surampudi Venkata Sai'
'Nanubolu, Jagadeesh Babu'
'Balasubramanian, Sridhar'
_publ_section_title
;
 Two novel polymorphic forms of iron-chelating agent deferiprone
;
_journal_coeditor_code           CU3158
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              193
_journal_page_last               200
_journal_paper_doi               10.1107/S2053229620000959
_journal_volume                  76
_journal_year                    2020
_chemical_formula_iupac          'C7 H9 N O2'
_chemical_formula_moiety         'C7 H9 N O2'
_chemical_formula_sum            'C7 H9 N O2'
_chemical_formula_weight         139.15
_chemical_name_common            Deferiprone
_chemical_name_systematic
;
3-Hydroxy-1,2-dimethylpyridin-4-one
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2018/3
_cell_angle_alpha                90
_cell_angle_beta                 95.6583(8)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.48470(10)
_cell_length_b                   13.6853(3)
_cell_length_c                   7.14620(10)
_cell_measurement_reflns_used    5426
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.49
_cell_measurement_theta_min      2.66
_cell_volume                     631.100(19)
_computing_cell_refinement
;
SAINT (Bruker, 2016)
;
_computing_data_collection
;
APEX3 (Bruker, 2016)
;
_computing_data_reduction
;
SAINT (Bruker, 2016)
;
_computing_molecular_graphics
;
DIAMOND (Brandenburg & Putz, 2005)
;
_computing_publication_material
;
SHELXTL (Bruker, 2016)
;
_computing_structure_refinement
;
SHELXL2014 (Sheldrick, 2015b)
;
_computing_structure_solution
;
SHELXT (Sheldrick, 2015a)
;
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker D8 QUEST PHOTON-100'
_diffrn_measurement_method       'ω and φ'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0286
_diffrn_reflns_av_unetI/netI     0.0276
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            7716
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.531
_diffrn_reflns_theta_min         2.977
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.7049
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
(SADABS; Bruker, 2016)
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.465
_exptl_crystal_description       block
_exptl_crystal_F_000             296
_exptl_crystal_size_max          0.330
_exptl_crystal_size_mid          0.180
_exptl_crystal_size_min          0.160
_refine_diff_density_max         0.426
_refine_diff_density_min         -0.271
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.068
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     97
_refine_ls_number_reflns         1922
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.0462
_refine_ls_R_factor_gt           0.0389
_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/[σ²(Fo²)+(0.0495P)²+0.2705P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1006
_refine_ls_wR_factor_ref         0.1046
_reflns_number_gt                1681
_reflns_number_total             1922
_reflns_threshold_expression     'I > 2σ(I)'
_cod_data_source_file            cu3158sup1.cif
_cod_data_source_block           Ib
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2021969
_shelx_space_group_comment
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;
_shelx_estimated_absorpt_t_min   0.965
_shelx_estimated_absorpt_t_max   0.983
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x, y+1/2, -z+1/2'
'-x, -y, -z'
'x, -y-1/2, z-1/2'
loop_
_atom_site_type_symbol
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_calc_flag
_atom_site_occupancy
C C1 0.39396(15) 0.21544(7) 0.40876(13) 0.00929(19) Uani d 1
C C2 0.42242(14) 0.31466(7) 0.42168(13) 0.00901(19) Uani d 1
C C3 0.26323(15) 0.38332(7) 0.35673(13) 0.0097(2) Uani d 1
C C4 0.07167(15) 0.34026(7) 0.28596(14) 0.0117(2) Uani d 1
H H4 -0.042505 0.381175 0.245672 0.014 Uiso calc 1
C C5 0.04889(15) 0.24128(7) 0.27488(14) 0.0113(2) Uani d 1
H H5 -0.080458 0.214858 0.224970 0.014 Uiso calc 1
C C6 0.16938(16) 0.07400(7) 0.31937(15) 0.0136(2) Uani d 1
H H6A 0.030437 0.061554 0.256977 0.020 Uiso calc 1
H H6B 0.180813 0.045615 0.445871 0.020 Uiso calc 1
H H6C 0.273046 0.044210 0.246263 0.020 Uiso calc 1
C C7 0.56126(15) 0.14404(7) 0.47281(14) 0.0120(2) Uani d 1
H H7A 0.594896 0.104351 0.365781 0.018 Uiso calc 1
H H7B 0.513253 0.101437 0.569862 0.018 Uiso calc 1
H H7C 0.685084 0.179601 0.524682 0.018 Uiso calc 1
N N1 0.20509(13) 0.17983(6) 0.33287(12) 0.00950(18) Uani d 1
O O1 0.60952(11) 0.34951(6) 0.49501(11) 0.01269(18) Uani d 1
H H1O 0.608(3) 0.4129(15) 0.515(3) 0.040(5) Uiso d 1
O O2 0.29796(12) 0.47457(5) 0.36221(11) 0.01408(18) Uani d 1
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
C2 C1 N1 118.99(9)
C2 C1 C7 122.44(9)
N1 C1 C7 118.57(9)
O1 C2 C1 118.82(9)
O1 C2 C3 118.68(9)
C1 C2 C3 122.49(9)
O2 C3 C4 124.40(9)
O2 C3 C2 120.89(9)
C4 C3 C2 114.70(9)
C5 C4 C3 121.19(9)
C5 C4 H4 119.4
C3 C4 H4 119.4
N1 C5 C4 121.81(9)
N1 C5 H5 119.1
C4 C5 H5 119.1
N1 C6 H6A 109.5
N1 C6 H6B 109.5
H6A C6 H6B 109.5
N1 C6 H6C 109.5
H6A C6 H6C 109.5
H6B C6 H6C 109.5
C1 C7 H7A 109.5
C1 C7 H7B 109.5
H7A C7 H7B 109.5
C1 C7 H7C 109.5
H7A C7 H7C 109.5
H7B C7 H7C 109.5
C5 N1 C1 120.75(8)
C5 N1 C6 119.05(8)
C1 N1 C6 120.18(8)
C2 O1 H1O 112.5(12)
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
C1 C2 1.3722(13)
C1 N1 1.3786(12)
C1 C7 1.4978(13)
C2 O1 1.3597(11)
C2 C3 1.4386(13)
C3 O2 1.2689(12)
C3 C4 1.4220(13)
C4 C5 1.3642(14)
C4 H4 0.9500
C5 N1 1.3498(13)
C5 H5 0.9500
C6 N1 1.4684(12)
C6 H6A 0.9800
C6 H6B 0.9800
C6 H6C 0.9800
C7 H7A 0.9800
C7 H7B 0.9800
C7 H7C 0.9800
O1 H1O 0.88(2)
loop_
_geom_hbond_atom_site_label_D
_geom_hbond_atom_site_label_H
_geom_hbond_atom_site_label_A
_geom_hbond_site_symmetry_A
_geom_hbond_distance_DH
_geom_hbond_distance_HA
_geom_hbond_distance_DA
_geom_hbond_angle_DHA
_geom_hbond_publ_flag
O1 H1O O2 3_666 0.88(2) 1.85(2) 2.6602(10) 153.0(17) yes
C6 H6A O2 2_545 0.98 2.51 3.4560(13) 161.2 yes
C7 H7A O2 2_645 0.98 2.55 3.5177(13) 168.3 yes
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
N1 C1 C2 O1 -179.40(8)
C7 C1 C2 O1 0.13(14)
N1 C1 C2 C3 -0.81(14)
C7 C1 C2 C3 178.71(9)
O1 C2 C3 O2 2.11(14)
C1 C2 C3 O2 -176.48(9)
O1 C2 C3 C4 -178.77(8)
C1 C2 C3 C4 2.65(13)
O2 C3 C4 C5 176.36(10)
C2 C3 C4 C5 -2.73(14)
C3 C4 C5 N1 1.04(16)
C4 C5 N1 C1 1.02(14)
C4 C5 N1 C6 179.19(9)
C2 C1 N1 C5 -1.11(13)
C7 C1 N1 C5 179.34(9)
C2 C1 N1 C6 -179.26(9)
C7 C1 N1 C6 1.20(13)

_cod_database_fobs_code 2021969
