Reversible phase transition in 8,19-dimethyl-2,3,8,19-tetraazapentacyclo[13.7.0.04,12.06,10.017,21]docosa-1(15),2,4(12),5,10,16,21-heptaene-7,9,18,20-tetrone
Näther, Christian; Businski, Artjom; Herges, Rainer; Acta Crystallographica Section E Crystallographic Communications 81 (2025) –; doi:10.1107/S2056989025003998

data_2023493
_publ_section_title
;
 Reversible phase transition in
 8,19-dimethyl-2,3,8,19-tetraazapentacyclo[13.7.0.04,12.06,10.017,21]docosa-1(15),2,4(12),5,10,16,21-heptaene-7,9,18,20-tetrone
;
_journal_coeditor_code           HB8139
_journal_issue                   6
_journal_name_full
'Acta Crystallographica Section E Crystallographic Communications'
_journal_paper_doi               10.1107/S2056989025003998
_journal_volume                  81
_journal_year                    2025
_chemical_formula_iupac          'C20 H14 N4 O4'
_chemical_formula_moiety         'C20 H14 N4 O4'
_chemical_formula_sum            'C20 H14 N4 O4'
_chemical_formula_weight         374.35
_chemical_name_common
<i>N</i>,<i>N</i>'-2,3,8,9-Bismethylsuccinimide-11,12-dihydrodibenzo[<i>c</i>,<i>g</i>][1,2]diazocine
_chemical_name_systematic
8,19-Dimethyl-2,3,8,19-tetraazapentacyclo[13.7.0.0^4,12^.0^6,10^.0^17,21^]docosa-1(15),2,4(12),5,10,16,21-heptaene-7,9,18,20-tetrone
_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   geom
_atom_sites_solution_primary     dual
_audit_creation_method
;
Olex2 1.3-ac4
(compiled 2020.11.27 svn.r5f609507 for Rigaku Oxford Diffraction, GUI svn.r6214)
;
_cell_angle_alpha                90
_cell_angle_beta                 106.7581(14)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.4290(2)
_cell_length_b                   8.05961(10)
_cell_length_c                   13.72324(16)
_cell_measurement_reflns_used    12821
_cell_measurement_temperature    299.99(10)
_cell_measurement_theta_max      78.3740
_cell_measurement_theta_min      2.8260
_cell_volume                     1739.94(4)
_computing_cell_refinement
;
CrysAlisPro 1.171.43.100a (Rigaku OD, 2023)
;
_computing_data_collection
;
CrysAlisPro 1.171.43.100a (Rigaku OD, 2023)
;
_computing_data_reduction
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CrysAlisPro 1.171.43.100a (Rigaku OD, 2023)
;
_computing_molecular_graphics
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DIAMOND (Brandenburg, 1999) and XP in <i>SHELXTL-PC</i> (Sheldrick,
2008)
;
_computing_publication_material
;
Publcif (Westrip, 2010)
;
_computing_structure_refinement
;
<i>SHELXL2016/6</i> (Sheldrick, 2015b)
;
_computing_structure_solution
;
<i>SHELXT2014/5</i> (Sheldrick, 2015a)
;
_diffrn_ambient_temperature      299.99(10)
_diffrn_detector                 'Hybrid Pixel Array Detector'
_diffrn_detector_area_resol_mean 10.0000
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'XtaLAB Synergy, Dualflex, HyPix'
_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  0.0171
_diffrn_reflns_av_unetI/netI     0.0126
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            20169
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         80.248
_diffrn_reflns_theta_min         2.809
_diffrn_source                   'micro-focus sealed X-ray tube'
_exptl_absorpt_coefficient_mu    0.854
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.87445
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
(CrysAlisPro; Rigaku OD, 2023)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.429
_exptl_crystal_description       block
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.148
_refine_diff_density_min         -0.156
_refine_ls_extinction_coef       0.0017(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method
;
<i>SHELXL2016/6</i> (Sheldrick, 2015b))
;
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     258
_refine_ls_number_reflns         3738
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0411
_refine_ls_R_factor_gt           0.0393
_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^)+(0.0523P)^2^+0.2804P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1074
_refine_ls_wR_factor_ref         0.1090
_reflns_number_gt                3529
_reflns_number_total             3738
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            hb8139.cif
_cod_data_source_block           300K
_cod_database_code               2023493
_shelx_hkl_checksum              99999
_shelx_res_checksum              17714