X-ray studies of three 3,6-bis(pyridin-2-yl)-1,2,4,5-tetrazine cocrystals: an unexpected molecular conformation stabilized by hydrogen bonds.
Wzgarda-Raj, Kinga; Dominikowska, Justyna; Wojtulewski, Sławomir; Rybarczyk-Pirek, Agnieszka J; Acta crystallographica. Section C, Structural chemistry 79 (2023) 52–60; doi:10.1107/S2053229622012256

data_2312671
_publ_section_title
;
 X-ray studies of three 3,6-bis(pyridin-2-yl)-1,2,4,5-tetrazine
 cocrystals: an unexpected molecular conformation stabilized by hydrogen
 bonds.
;
_journal_coeditor_code           DG3037
_journal_issue                   'Pt 2'
_journal_name_full
'Acta crystallographica. Section C, Structural chemistry'
_journal_page_first              52
_journal_page_last               60
_journal_paper_doi               10.1107/S2053229622012256
_journal_volume                  79
_journal_year                    2023
_chemical_formula_iupac          'C12 H8 N6, 2C6 H5 N O3'
_chemical_formula_moiety         'C12 H8 N6, 2(C6 H5 N O3)'
_chemical_formula_sum            'C24 H18 N8 O6'
_chemical_formula_weight         514.46
_chemical_name_systematic
;
3,6-Bis(pyridin-2-yl)-1,2,4,5-tetrazine--4-carboxypyridine <i>N</i>-oxide (1/2)
;
_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
_atom_sites_solution_primary     iterative
_audit_creation_method
;
Olex2 1.5
(compiled 2022.04.07 svn.rca3783a0 for OlexSys, GUI svn.r6498)
;
_cell_angle_alpha                90
_cell_angle_beta                 107.835(5)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   3.8067(2)
_cell_length_b                   21.3885(7)
_cell_length_c                   14.2669(6)
_cell_measurement_reflns_used    4366
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      76.1940
_cell_measurement_theta_min      3.8630
_cell_volume                     1105.78(9)
_computing_cell_refinement
;
CrysAlis PRO (Rigaku OD, 2015)
;
_computing_data_collection
;
CrysAlis PRO (Rigaku OD, 2015)
;
_computing_data_reduction
;
CrysAlis PRO (Rigaku OD, 2015)
;
_computing_molecular_graphics
;
OLEX2 (Dolomanov <i>et al.</i>,  2009)
;
_computing_publication_material
;
OLEX2 (Dolomanov <i>et al.</i>,  2009)
;
_computing_structure_refinement
;
SHELXL2018 (Sheldrick, 2015<i>b</i>)
;
_computing_structure_solution
;
olex2.solve (Bourhis <i>et al.</i>,  2015)
;
_diffrn_ambient_temperature      293(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 10.4052
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type
;
Rigaku OD SuperNova (Dual, Cu at home/near) diffractometer with an Atlas
detector
;
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0468
_diffrn_reflns_av_unetI/netI     0.0284
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            10838
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         68.488
_diffrn_reflns_theta_min         3.855
_diffrn_source                   'micro-focus sealed X-ray tube'
_exptl_absorpt_coefficient_mu    0.973
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.88624
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
(CrysAlis PRO; Rigaku OD, 2015)
;
_exptl_crystal_colour            pink
_exptl_crystal_density_diffrn    1.545
_exptl_crystal_description       plate
_exptl_crystal_F_000             532
_exptl_crystal_size_max          0.256
_exptl_crystal_size_mid          0.077
_exptl_crystal_size_min          0.037
_refine_diff_density_max         0.241
_refine_diff_density_min         -0.296
_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     176
_refine_ls_number_reflns         2048
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.0475
_refine_ls_R_factor_gt           0.0421
_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^)+(0.0682P)^2^+0.2944P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1072
_refine_ls_wR_factor_ref         0.1110
_reflns_number_gt                1806
_reflns_number_total             2048
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            dg3037sup1.cif
_cod_data_source_block           II
_cod_database_code               2312671
_shelx_hkl_checksum              84216
_shelx_res_checksum              30034
_cod_database_fobs_code 2312671