Stealth fast photoswitching of negative photochromic naphthalene-bridged phenoxyl-imidazolyl radical complexes
Katsuya Mutoh; Yoichi Kobayashi; Yasukazu Hirao; Takashi Kubo; Jiro Abe; Chem.Commun. 52 (2016) 6797–; doi:

data_7119124
_publ_section_title
;
 Stealth fast photoswitching of negative photochromic naphthalene-bridged
 phenoxyl-imidazolyl radical complexes
;
_journal_name_full               Chem.Commun.
_journal_page_first              6797
_journal_volume                  52
_journal_year                    2016
_chemical_formula_sum            'C31 H20 N2 O'
_chemical_formula_weight         436.49
_chemical_name_systematic
'naphthalene bridged phenoxyl-imidazolyl radical complex'
_chemical_properties_physical    Photo-sensitive
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_update_record
;
2016-02-18 deposited with the CCDC.
2016-04-20 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 100.3750(10)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   15.6295(14)
_cell_length_b                   11.7772(10)
_cell_length_c                   23.646(2)
_cell_measurement_reflns_used    9906
_cell_measurement_temperature    90.0
_cell_measurement_theta_max      26.3763
_cell_measurement_theta_min      2.4352
_cell_volume                     4281.4(6)
_computing_cell_refinement       'SAINT V8.32B (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker SMART APEXII'
_computing_data_reduction        'SAINT V8.32B (Bruker AXS Inc., 2013)'
_computing_molecular_graphics    'XSHELL V6.3.1 (Bruker AXS)'
_computing_publication_material  'Generate Report (Bruker AXS)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      90.0
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker D8 goniometer'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0187
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            22198
_diffrn_reflns_theta_full        26.39
_diffrn_reflns_theta_max         26.39
_diffrn_reflns_theta_min         1.45
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.97
_exptl_absorpt_correction_T_min  0.90
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS Sheldrick 1996'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.354
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1824
_exptl_crystal_preparation       'photochromic compound'
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: CHCl3 and hexane'
_exptl_crystal_size_max          0.500
_exptl_crystal_size_mid          0.400
_exptl_crystal_size_min          0.400
_refine_diff_density_max         0.262
_refine_diff_density_min         -0.217
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.989
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     613
_refine_ls_number_reflns         8756
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.989
_refine_ls_R_factor_all          0.0475
_refine_ls_R_factor_gt           0.0369
_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^)+(0.0409P)^2^+1.8513P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0874
_refine_ls_wR_factor_ref         0.0932
_reflns_number_gt                7251
_reflns_number_total             8756
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6cc01534d2.cif
_cod_data_source_block           I
_cod_original_cell_volume        4281.4(7)
_cod_database_code               7119124
_shelx_res_checksum              58224