Boron-based donor-spiro-acceptor compounds exhibiting thermally activated delayed fluorescence (TADF).
Stanoppi, Marco; Lorbach, Andreas; Dalton transactions (Cambridge, England : 2003) 47 (2018) 10394–10398; doi:10.1039/c8dt01255e

data_7046225
_publ_section_title
;
 Boron-based donor-spiro-acceptor compounds exhibiting thermally activated
 delayed fluorescence (TADF).
;
_journal_issue                   31
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              10394
_journal_page_last               10398
_journal_paper_doi               10.1039/c8dt01255e
_journal_volume                  47
_journal_year                    2018
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C24 H19 B N2'
_chemical_formula_sum            'C24 H19 B N2'
_chemical_formula_weight         346.22
_space_group_crystal_system      monoclinic
_space_group_IT_number           9
_space_group_name_Hall           'C -2yc'
_space_group_name_H-M_alt        'C 1 c 1'
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2017-10-25
_audit_creation_method
;
Olex2 1.2
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5381)
;
_audit_update_record
;
2018-03-16 deposited with the CCDC.
2018-05-02 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 120.520(5)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.4501(8)
_cell_length_b                   24.7509(16)
_cell_length_c                   8.0062(6)
_cell_measurement_reflns_used    13436
_cell_measurement_temperature    100(1)
_cell_measurement_theta_max      29.83
_cell_measurement_theta_min      2.78
_cell_volume                     1783.9(2)
_computing_cell_refinement       'STOE X-AREA'
_computing_data_collection       'STOE X-AREA'
_computing_data_reduction        'STOE X-RED'
_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      100(1)
_diffrn_detector                 'image plate (34 cm diameter)'
_diffrn_detector_area_resol_mean 6.67
_diffrn_detector_type            STOE
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       '2-circle goniometer'
_diffrn_measurement_device_type  'STOE IPDS 2T'
_diffrn_measurement_method       'rotation method'
_diffrn_radiation_collimation    '0.5 mm diameter, monocapillary'
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0510
_diffrn_reflns_av_unetI/netI     0.0496
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -33
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            12068
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.556
_diffrn_reflns_theta_min         2.781
_diffrn_source
'sealed X-ray tube, 12 x 0.4 mm long-fine focus'
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  1.06906
_exptl_absorpt_correction_T_min  0.92047
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'MULABS / PLATON Spek, A.L. (2003). J. Appl. Cryst. 36, 7-13. Spek, A.L. (2009). Acta Cryst. D65, 148-155.'
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.289
_exptl_crystal_description       block
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.375
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.171
_refine_diff_density_min         -0.194
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details
;
 Flack x determined using 1491 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   -0.7(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.009
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     245
_refine_ls_number_reflns         4527
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.008
_refine_ls_R_factor_all          0.0616
_refine_ls_R_factor_gt           0.0450
_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^)+(0.0496P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0912
_refine_ls_wR_factor_ref         0.0966
_reflns_Friedel_coverage         0.988
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.993
_reflns_number_gt                3695
_reflns_number_total             4527
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt01255e3.cif
_cod_data_source_block           AL38
_cod_depositor_comments
'Adding full bibliography for 7046223--7046226.cif.'
_cod_database_code               7046225
_shelxl_version_number           2013-4
_shelx_estimated_absorpt_t_max   0.989
_shelx_estimated_absorpt_t_min   0.967
_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:
 C2(H2), C3(H3), C4(H4), C5(H5), C8(H8), C9(H9), C10(H10), C11(H11), C14(H14),
 C15(H15), C16(H16), C17(H17), C20(H20), C21(H21), C22(H22), C23(H23)
2.b Idealised Me refined as rotating group:
 C24(H24A,H24B,H24C)
;
_olex2_exptl_crystal_mounting_method
'Mounted on MiTeGen Dual-Thickness MicroMounts in paraffin oil.'
_olex2_submission_special_instructions 'No special instructions were received'