A bipyrrole scaffold as an emerging Frontier in robust design of high energy materials.
Shanmugapriya, V.; Panda, Pradeepta K.; Chemical communications (Cambridge, England) 62 (2026) 1936–1940; doi:10.1039/d5cc06662j

data_7135513
_publ_section_title
;
 A bipyrrole scaffold as an emerging Frontier in robust design of high
 energy materials.
;
_journal_issue                   6
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              1936
_journal_page_last               1940
_journal_paper_doi               10.1039/d5cc06662j
_journal_volume                  62
_journal_year                    2026
_chemical_formula_moiety         'C8 H6 N4 O4'
_chemical_formula_sum            'C8 H6 N4 O4'
_chemical_formula_weight         222.17
_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     iterative
_audit_creation_date             2025-11-06
_audit_creation_method
;
Olex2 1.3-ac4
(compiled 2018.12.18 svn.r3554 for Rigaku Oxford Diffraction, GUI svn.r1)
;
_audit_update_record
;
2025-11-17 deposited with the CCDC.	2025-12-16 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 96.051(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.5856(7)
_cell_length_b                   20.0958(19)
_cell_length_c                   6.9138(7)
_cell_measurement_reflns_used    6717
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      27.46
_cell_measurement_theta_min      3.11
_cell_volume                     909.89(16)
_computing_cell_refinement       'SAINT V8.40B (?, 2016)'
_computing_data_reduction        'SAINT V8.40B (?, 2016)'
_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    'olex2.solve (Bourhis et al., 2015)'
_diffrn_ambient_temperature      295.0
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0544
_diffrn_reflns_av_unetI/netI     0.0312
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.990
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            16399
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.990
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.522
_diffrn_reflns_theta_min         3.132
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.134
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6427
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1657 before and 0.0747 after correction.
The Ratio of minimum to maximum transmission is 0.8620.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'clear light yellow'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.622
_exptl_crystal_description       plate
_exptl_crystal_F_000             456
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.671
_refine_diff_density_min         -0.568
_refine_diff_density_rms         0.106
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.139
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     145
_refine_ls_number_reflns         2069
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.139
_refine_ls_R_factor_all          0.1108
_refine_ls_R_factor_gt           0.0992
_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^)+(0.1494P)^2^+2.0788P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3013
_refine_ls_wR_factor_ref         0.3079
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1622
_reflns_number_total             2069
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5cc06662j2.cif
_cod_data_source_block           VSP-C3
_cod_database_code               7135513
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.987
_shelx_estimated_absorpt_t_min   0.974
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H) groups
2.a Aromatic/amide H refined with riding coordinates:
 N004(H004), C005(H005), C00C(H00C), C00D(H00D), N2(H2), C00G(H00G)
;
_shelx_res_checksum              17128
_olex2_submission_original_sample_id compound-3
_olex2_submission_special_instructions 'No special instructions were received'