Photochromic and molecular switching behaviour of new Schiff bases containing hydantoin rings: synthesis, characterization and crystal structures
Todorov, Petar T.; Peneva, Petia N.; Georgieva, Stela I.; Rusew, Rusi I.; Shivachev, Boris L.; Georgiev, Anton H.; New Journal of Chemistry 43 (2019) 2740–; doi:10.1039/C8NJ05748F

data_7058096
_publ_section_title
;
 Photochromic and molecular switching behaviour of new Schiff bases
 containing hydantoin rings: synthesis, characterization and crystal
 structures
;
_journal_issue                   6
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              2740
_journal_paper_doi               10.1039/C8NJ05748F
_journal_volume                  43
_journal_year                    2019
_chemical_formula_moiety         'C12 H13 N3 O3'
_chemical_formula_sum            'C12 H13 N3 O3'
_chemical_formula_weight         247.25
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_date             2018-07-11
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2018-11-11 deposited with the CCDC.
2019-01-08 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 100.475(4)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   21.3276(8)
_cell_length_b                   5.8210(3)
_cell_length_c                   20.1338(9)
_cell_measurement_reflns_used    4478
_cell_measurement_temperature    290
_cell_measurement_theta_max      27.0160
_cell_measurement_theta_min      4.0780
_cell_volume                     2457.91(19)
_computing_cell_refinement       'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_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    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      290.0
_diffrn_detector_area_resol_mean 10.3974
_diffrn_detector_type            Atlas
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.901
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
  1  \w     15.00  53.00   1.00   17.50    --    8.44  38.00  60.00   38
  2  \w      1.00  27.00   1.00   17.50    --    8.44 -57.00  60.00   26
  3  \w    -43.00  35.00   1.00   17.50    --    8.44 -57.00 -60.00   78
  4  \w     24.00  80.00   1.00   17.50    --    8.44  38.00 120.00   56
  5  \w    -10.00  48.00   1.00   17.50    --    8.44  57.00 -90.00   58
  6  \w     22.00  70.00   1.00   17.50    --    8.44  38.00-180.00   48
  7  \w    -60.00 -19.00   1.00   17.50    --    8.44 -38.00-150.00   41
  8  \w     48.00  77.00   1.00   17.50    --    8.44  57.00 -60.00   29
  9  \w    -20.00   5.00   1.00   17.50    --   -9.06 -99.00-180.00   25
 10  \w     -8.00  30.00   1.00   17.50    --   -9.06 -99.00   0.00   38
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0406
_diffrn_reflns_av_unetI/netI     0.0311
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.901
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            14020
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.901
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.167
_diffrn_reflns_theta_min         3.076
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.57165
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.46 (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.336
_exptl_crystal_description       prism
_exptl_crystal_F_000             1040
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.147
_refine_diff_density_min         -0.182
_refine_diff_density_rms         0.040
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     173
_refine_ls_number_reflns         2973
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0822
_refine_ls_R_factor_gt           0.0516
_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^)+(0.0510P)^2^+1.9360P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1227
_refine_ls_wR_factor_ref         0.1420
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1991
_reflns_number_total             2973
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8nj05748f2.cif
_cod_data_source_block           exp_453
_cod_depositor_comments
'Adding full bibliography for 7058094--7058097.cif.'
_cod_original_cell_volume        2457.92(18)
_cod_database_code               7058096
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.988
_shelx_estimated_absorpt_t_min   0.971
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C6(H6), C12(H12), C11(H11), C9(H9), C10(H10)
2.b Idealised Me refined as rotating group:
 C2(H2A,H2B,H2C), C1(H1A,H1B,H1C)
;
_shelx_res_checksum              69467
_shelx_hkl_checksum              88216
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;