A boron-doped helicene as a highly soluble, benchtop-stable green emitter
Schickedanz, Kai; Trageser, Timo; Bolte, Michael; Lerner, Hans-Wolfram; Wagner, Matthias; Chemical Communications (Cambridge, United Kingdom) 51 (2015) 15808–15810; doi:10.1039/c5cc07208e

data_7117997
_publ_section_title
;
 A boron-doped helicene as a highly soluble, benchtop-stable green emitter
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   87
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              15808
_journal_page_last               15810
_journal_paper_doi               10.1039/c5cc07208e
_journal_volume                  51
_journal_year                    2015
_chemical_formula_moiety         'C26 H15 B'
_chemical_formula_sum            'C26 H15 B'
_chemical_formula_weight         338.19
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/6
_audit_update_record
;
2015-08-25 deposited with the CCDC.
2015-09-14 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   3.9791(12)
_cell_length_b                   19.948(6)
_cell_length_c                   20.208(5)
_cell_measurement_reflns_used    2443
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.4
_cell_measurement_theta_min      3.3
_cell_volume                     1604.0(8)
_computing_cell_refinement       'X-Area (Stoe & Cie, 2001)'
_computing_data_collection       'X-Area (Stoe & Cie, 2001)'
_computing_data_reduction        'X-Area (Stoe & Cie, 2001)'
_computing_molecular_graphics    'XP in SHELXTL-Plus (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-2014/6 (Sheldrick, 2014)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'STOE IPDS II two-circle-diffractometer'
_diffrn_measurement_method       \w
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1333
_diffrn_reflns_av_unetI/netI     0.2106
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.984
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            7082
_diffrn_reflns_point_group_measured_fraction_full 0.987
_diffrn_reflns_point_group_measured_fraction_max 0.971
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         25.735
_diffrn_reflns_theta_min         3.192
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  0.891
_exptl_absorpt_correction_T_min  0.871
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'X-Area (Stoe & Cie, 2001)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.400
_exptl_crystal_description       plate
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.170
_exptl_crystal_size_mid          0.090
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_refine_diff_density_max         0.192
_refine_diff_density_min         -0.215
_refine_diff_density_rms         0.045
_refine_ls_abs_structure_details
; 
 Flack x determined using 269 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   -10.0(10)
_refine_ls_extinction_coef       0.017(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.844
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     245
_refine_ls_number_reflns         2966
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.844
_refine_ls_R_factor_all          0.1732
_refine_ls_R_factor_gt           0.0677
_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^)+(0.0211P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1014
_refine_ls_wR_factor_ref         0.1360
_reflns_Friedel_coverage         0.636
_reflns_Friedel_fraction_full    0.975
_reflns_Friedel_fraction_max     0.951
_reflns_number_gt                1172
_reflns_number_total             2966
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c5cc07208e2-3.cif
_cod_data_source_block           wa2021
_cod_database_code               7117997
_shelx_estimated_absorpt_t_min   0.987
_shelx_estimated_absorpt_t_max   0.999
_shelxl_version_number           2014/6
_shelx_res_checksum              81726