Peroxosolvates of purine derivatives: structural insights into possible H2O2-purine interactions in biological systems
Churakov, Andrei V.; Mikhaylov, Alexey A.; Mel'nik, Elena A.; Egorov, Pavel A.; Lev, Ovadia; Medvedev, Alexander G.; Prikhodchenko, Petr V.; CrystEngComm 28 (2026) 1115–1124; doi:10.1039/D5CE01073J

data_7251513
_publ_section_title
;
 Peroxosolvates of purine derivatives: structural insights into possible
 H2O2-purine interactions in biological systems
;
_journal_issue                   6
_journal_name_full               CrystEngComm
_journal_page_first              1115
_journal_page_last               1124
_journal_paper_doi               10.1039/D5CE01073J
_journal_volume                  28
_journal_year                    2026
_chemical_formula_moiety         'C7 H8 N4 O2, H2 O2'
_chemical_formula_sum            'C7 H10 N4 O4'
_chemical_formula_weight         214.19
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2025-11-30 deposited with the CCDC.	2026-01-06 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 101.1707(8)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.85400(10)
_cell_length_b                   16.7182(4)
_cell_length_c                   9.2006(2)
_cell_measurement_reflns_used    7234
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      30.552
_cell_measurement_theta_min      3.548
_cell_volume                     883.39(3)
_computing_cell_refinement       'SAINT (Bruker, 2018)'
_computing_data_collection       '<i>APEX2</i> (Bruker, 2018)'
_computing_data_reduction        'SAINT (Bruker, 2018)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT (Sheldrick, 2016)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker SMART APEX II'
_diffrn_measurement_method       \w
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0188
_diffrn_reflns_av_unetI/netI     0.0170
_diffrn_reflns_Laue_measured_fraction_full 0.989
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            10415
_diffrn_reflns_point_group_measured_fraction_full 0.989
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.995
_diffrn_reflns_theta_min         3.548
_exptl_absorpt_coefficient_mu    0.134
_exptl_absorpt_correction_T_max  0.9281
_exptl_absorpt_correction_T_min  0.8180
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2016)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.610
_exptl_crystal_description       prism
_exptl_crystal_F_000             448
_exptl_crystal_size_max          0.500
_exptl_crystal_size_mid          0.500
_exptl_crystal_size_min          0.250
_refine_diff_density_max         0.477
_refine_diff_density_min         -0.230
_refine_diff_density_rms         0.055
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     176
_refine_ls_number_reflns         2551
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0425
_refine_ls_R_factor_gt           0.0390
_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^)+(0.0626P)^2^+0.3237P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1082
_refine_ls_wR_factor_ref         0.1113
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2332
_reflns_number_total             2551
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5ce01073j2.cif
_cod_data_source_block           a
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7251513
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.936
_shelx_estimated_absorpt_t_max   0.967
_shelx_res_checksum              69933