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_7251514
_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      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     difmap
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2016/6
_audit_update_record
;
2025-06-01 deposited with the CCDC.	2026-01-06 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   13.6261(3)
_cell_length_b                   7.1632(1)
_cell_length_c                   18.3896(3)
_cell_measurement_reflns_used    9940
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.482
_cell_measurement_theta_min      3.052
_cell_volume                     1794.94(6)
_computing_cell_refinement       'SAINT (Bruker, 2018)'
_computing_data_collection       '<i>APEX3</i> (Bruker, 2018)'
_computing_data_reduction        'SAINT (Bruker, 2018)'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXT (Sheldrick, 2016)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.995
_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  0.0234
_diffrn_reflns_av_unetI/netI     0.0131
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            19915
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.988
_diffrn_reflns_theta_min         3.399
_exptl_absorpt_coefficient_mu    0.132
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2016)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.585
_exptl_crystal_description       parallelepiped
_exptl_crystal_F_000             896
_exptl_crystal_size_max          0.400
_exptl_crystal_size_mid          0.400
_exptl_crystal_size_min          0.350
_exptl_transmission_factor_max   0.9281
_exptl_transmission_factor_min   0.8827
_refine_diff_density_max         0.481
_refine_diff_density_min         -0.219
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.074
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     176
_refine_ls_number_reflns         2366
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.074
_refine_ls_R_factor_all          0.0378
_refine_ls_R_factor_gt           0.0355
_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^)+(0.0515P)^2^+0.7819P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0942
_refine_ls_wR_factor_ref         0.0961
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2210
_reflns_number_total             2366
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5ce01073j2.cif
_cod_data_source_block           A
_cod_database_code               7251514
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.949
_shelx_estimated_absorpt_t_max   0.955
_shelx_res_checksum              5779