Study of influence of anion nature on crystal packing features and feasibility of [2 + 2] photocycloaddition reaction in protonated forms of dimethoxystyrylheterocycles
Kuzmina, Lyudmila G.; Vedernikov, Artem I.; Sazonov, Sergey K.; Aleksandrova, Nadezhda A.; Alfimov, Michael V.; Gromov, Sergey P.; CrystEngComm  (2026) –; doi:10.1039/D5CE01173F

data_7251631
_publ_section_title
;
 Study of the influence of anion nature on crystal packing features and
 feasibility of [2 + 2] photocycloaddition reaction in protonated forms of
 dimethoxystyrylheterocycles
;
_journal_issue                   16
_journal_name_full               CrystEngComm
_journal_page_first              2560
_journal_page_last               2577
_journal_paper_doi               10.1039/D5CE01173F
_journal_volume                  28
_journal_year                    2026
_chemical_formula_moiety         '2(C15 H15 N O2), 2(C7 H6 O2)'
_chemical_formula_sum            'C22 H21 N O4'
_chemical_formula_weight         363.40
_chemical_name_systematic
'4-[(E)-2-(3,4-dimethoxyphenyl)vinyl]pyridine,co-crystallizate with benzoic acid'
_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   mixed
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2025-10-10 deposited with the CCDC.	2026-02-16 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            16
_cell_length_a                   7.1325(2)
_cell_length_b                   44.5540(12)
_cell_length_c                   23.0878(6)
_cell_measurement_reflns_used    2825
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      21.708
_cell_measurement_theta_min      2.743
_cell_volume                     7336.9(3)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART-6K'
_diffrn_measurement_method       /W
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1404
_diffrn_reflns_av_unetI/netI     0.1180
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       58
_diffrn_reflns_limit_k_min       -58
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            51152
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.998
_diffrn_reflns_theta_min         0.914
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellowish
_exptl_crystal_density_diffrn    1.316
_exptl_crystal_description       needle
_exptl_crystal_F_000             3072
_exptl_crystal_size_max          0.350
_exptl_crystal_size_mid          0.120
_exptl_crystal_size_min          0.060
_refine_diff_density_max         0.243
_refine_diff_density_min         -0.268
_refine_diff_density_rms         0.055
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     499
_refine_ls_number_reflns         8867
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.1466
_refine_ls_R_factor_gt           0.0662
_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^)+(0.0413P)^2^+0.8080P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1272
_refine_ls_wR_factor_ref         0.1570
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4548
_reflns_number_total             8867
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5ce01173f2.cif
_cod_data_source_block           pp_CCDC2
_cod_depositor_comments
'Adding full bibliography for 7251618--7251632.cif.'
_cod_database_code               7251631
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.969
_shelx_estimated_absorpt_t_max   0.995
_shelx_res_checksum              31754