First example of solid-state luminescent borasiloxane-based chiral helices assembled through N-B bonds.
Podda, Enrico; Coles, Simon J.; Horton, Peter N.; Lickiss, Paul D.; Bull, Okpara S.; Orton, James B.; Pintus, Anna; Pugh, David; Carla Aragoni, M.; Davies, Robert P.; Dalton transactions (Cambridge, England : 2003) 50 (2021) 3782–3785; doi:10.1039/d1dt00114k

data_7706664
_publ_section_title
;
 First example of solid-state luminescent borasiloxane-based chiral
 helices assembled through N-B bonds.
;
_journal_issue                   11
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3782
_journal_page_last               3785
_journal_paper_doi               10.1039/d1dt00114k
_journal_volume                  50
_journal_year                    2021
_chemical_formula_moiety         'C36 H28 B2 F2 O4 Si2'
_chemical_formula_sum            'C36 H28 B2 F2 O4 Si2'
_chemical_formula_weight         640.38
_chemical_name_systematic
'8-bis(4-fluorophenyl)-2,2,6,6-tetraphenyl- 1,3,5,7,2,6,4,8-tetraoxadisiladiborocane'
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2016/4
_audit_update_record
;
2020-12-21 deposited with the CCDC.	2021-02-19 downloaded from the CCDC.
;
_cell_angle_alpha                112.478(8)
_cell_angle_beta                 108.622(6)
_cell_angle_gamma                91.091(7)
_cell_formula_units_Z            1
_cell_length_a                   8.5686(6)
_cell_length_b                   9.8331(10)
_cell_length_c                   11.3579(8)
_cell_measurement_reflns_used    1572
_cell_measurement_temperature    173.00(10)
_cell_measurement_theta_max      27.1830
_cell_measurement_theta_min      3.1750
_cell_volume                     827.02(14)
_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    ORTEP-3
_computing_publication_material  'WinGX, enCIFer'
_computing_structure_refinement  'SHELXL-2016/4 (Sheldrick, 2016)'
_computing_structure_solution    Olex-2
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      173.00(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 16.0382
_diffrn_detector_type            Eos
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Xcalibur, Eos'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0164
_diffrn_reflns_av_unetI/netI     0.0555
_diffrn_reflns_Laue_measured_fraction_full 0.989
_diffrn_reflns_Laue_measured_fraction_max 0.989
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            4382
_diffrn_reflns_point_group_measured_fraction_full 0.989
_diffrn_reflns_point_group_measured_fraction_max 0.989
_diffrn_reflns_theta_full        25.022
_diffrn_reflns_theta_max         25.022
_diffrn_reflns_theta_min         3.124
_diffrn_source                   'fine-focus sealed X-ray tube'
_diffrn_source_type              'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.157
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.97249
_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_density_diffrn    1.286
_exptl_crystal_description       block
_exptl_crystal_F_000             332
_exptl_crystal_preparation       Luminescent
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.250
_exptl_crystal_size_min          0.150
_refine_diff_density_max         0.229
_refine_diff_density_min         -0.297
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         2890
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0714
_refine_ls_R_factor_gt           0.0467
_refine_ls_shift/su_max          0.013
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0445P)^2^+0.0257P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0941
_refine_ls_wR_factor_ref         0.1018
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2089
_reflns_number_total             2890
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1dt00114k2.cif
_cod_data_source_block           Compound_2
_cod_depositor_comments
'Adding full bibliography for 7706663--7706667.cif.'
_cod_original_cell_volume        827.02(13)
_cod_database_code               7706664
_shelx_shelxl_version_number     2016/4
_shelx_estimated_absorpt_t_min   0.954
_shelx_estimated_absorpt_t_max   0.977
_oxdiff_exptl_absorpt_empirical_full_min 0.915
_oxdiff_exptl_absorpt_empirical_full_max 1.052
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_shelx_res_checksum              7623
_shelx_hkl_checksum              39915