Cocrystal engineering strategy for sustained release and leaching reduction of herbicides: a case study of metamitron
Xiao, Yuntian; Wu, Chuanhua; Zhou, Ling; Yin, Qiuxiang; Yang, Jingxiang; Green Chemistry 24 (2022) 8088–8099; doi:10.1039/D2GC02949A

data_7245549
_publ_section_title
;
 Cocrystal engineering strategy for sustained release and leaching
 reduction of herbicides: a case study of metamitron
;
_journal_issue                   20
_journal_name_full               'Green Chemistry'
_journal_page_first              8088
_journal_page_last               8099
_journal_paper_doi               10.1039/D2GC02949A
_journal_volume                  24
_journal_year                    2022
_chemical_formula_moiety         'C10 H10 N4 O, C15 H10 O5'
_chemical_formula_sum            'C25 H20 N4 O6'
_chemical_formula_weight         472.45
_chemical_name_systematic        Metamitron-Baicalein
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2021-12-01
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2022-05-07 deposited with the CCDC.	2022-09-16 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 89.950(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.2165(2)
_cell_length_b                   13.1426(4)
_cell_length_c                   31.0132(10)
_cell_measurement_reflns_used    10188
_cell_measurement_temperature    113.15
_cell_measurement_theta_max      31.0820
_cell_measurement_theta_min      2.4930
_cell_volume                     2126.21(12)
_computing_cell_refinement       'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_data_collection       'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_data_reduction        'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_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    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      123.15
_diffrn_detector                 'CCD plate'
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
  1  \w   -120.00  60.00   1.00   10.00    --  -30.00  45.00   0.00  180
  2  \w   -120.00  60.00   1.00   10.00    --  -30.00  45.00  90.00  180
  3  \w   -120.00  60.00   1.00   10.00    --  -30.00  45.00 180.00  180
;
_diffrn_measurement_device       'abstract diffractometer'
_diffrn_measurement_device_type  'Rigaku Saturn 70 CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      0.0019704000
_diffrn_orient_matrix_UB_12      -0.0517095000
_diffrn_orient_matrix_UB_13      -0.0065207000
_diffrn_orient_matrix_UB_21      0.0140002000
_diffrn_orient_matrix_UB_22      -0.0152372000
_diffrn_orient_matrix_UB_23      0.0218101000
_diffrn_orient_matrix_UB_31      -0.1352733000
_diffrn_orient_matrix_UB_32      -0.0022981000
_diffrn_orient_matrix_UB_33      0.0021783000
_diffrn_radiation_monochromator  confocal
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0578
_diffrn_reflns_av_unetI/netI     0.0441
_diffrn_reflns_Laue_measured_fraction_full 0.989
_diffrn_reflns_Laue_measured_fraction_max 0.989
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       41
_diffrn_reflns_limit_l_min       -39
_diffrn_reflns_number            21827
_diffrn_reflns_point_group_measured_fraction_full 0.989
_diffrn_reflns_point_group_measured_fraction_max 0.989
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.700
_diffrn_reflns_theta_min         2.507
_diffrn_source                   'rotating anode'
_diffrn_source_type              'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.91329
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'CrysAlisPro 1.171.39.46 (Rigaku Oxford Diffraction, 2018)'
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.476
_exptl_crystal_description       needle
_exptl_crystal_F_000             984
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.321
_refine_diff_density_min         -0.193
_refine_diff_density_rms         0.047
_refine_ls_extinction_coef       0.0105(16)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     369
_refine_ls_number_reflns         5417
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0789
_refine_ls_R_factor_gt           0.0525
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0580P)^2^+0.7257P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1221
_refine_ls_wR_factor_ref         0.1376
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3901
_reflns_number_total             5417
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2gc02949a2.cif
_cod_data_source_block           r20211130b
_cod_depositor_comments
'Adding full bibliography for 7245547--7245549.cif.'
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7245549
_shelx_shelxl_version_number     2018/3
_reflns_odcompleteness_completeness 92.19
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     31.19
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Restrained distances
 C1-C7 \\sim C1A-C7
 with sigma of 0.01
3. Others
 Sof(C1A)=Sof(H1A)=Sof(C2A)=Sof(H2A)=Sof(C3A)=Sof(H3A)=Sof(C4A)=Sof(H4AA)=
 Sof(C5A)=Sof(H5A)=Sof(C6A)=1-FVAR(1)
 Sof(C1)=Sof(H1)=Sof(C2)=Sof(H2)=Sof(C3)=Sof(H3)=Sof(C4)=Sof(H4)=Sof(C5)=
 Sof(H5)=Sof(C6)=FVAR(1)
4.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C4(H4), C5(H5), C1A(H1A), C2A(H2A), C3A(H3A),
 C4A(H4AA), C5A(H5A), C14(H14), C18(H18), C21(H21), C22(H22), C23(H23),
 C24(H24), C25(H25)
4.b Fitted hexagon refined as free rotating group:
 C1(C2,C3,C4,C5,C6), C1A(C2A,C3A,C4A,C5A,C6A)
4.c Idealised Me refined as rotating group:
 C10(H10A,H10B,H10C)
;
_shelx_res_checksum              54174
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
- Detector area scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.303
_oxdiff_exptl_absorpt_empirical_full_min 0.804