Modification at a boron unit: tuning electronic and optical properties of pi-conjugated acyclic anion receptors.
Maeda, Hiromitsu; Takayama, Mayumi; Kobayashi, Kazuki; Shinmori, Hideyuki; Organic & biomolecular chemistry 8 (2010) 4308–4315; doi:10.1039/c0ob00044b

data_7153419
_publ_section_title
;
 Modification at a boron unit: tuning electronic and optical properties of
 pi-conjugated acyclic anion receptors.
;
_journal_issue                   19
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              4308
_journal_page_last               4315
_journal_paper_doi               10.1039/c0ob00044b
_journal_volume                  8
_journal_year                    2010
_chemical_formula_sum            'C51 H63 B Br N3 O2'
_chemical_formula_weight         840.76
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 103.643(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.723(3)
_cell_length_b                   14.488(2)
_cell_length_c                   23.592(5)
_cell_measurement_temperature    123(2)
_cell_volume                     4558.2(15)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_detector_area_resol_mean 10
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Rigaku RAXIS-RAPID'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0544
_diffrn_reflns_av_sigmaI/netI    0.0458
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            38565
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         3.01
_exptl_absorpt_coefficient_mu    0.944
_exptl_absorpt_correction_T_max  0.8337
_exptl_absorpt_correction_T_min  0.6497
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.225
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1784
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.419
_refine_diff_density_min         -2.800
_refine_diff_density_rms         0.231
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.795
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     551
_refine_ls_number_reflns         8931
_refine_ls_number_restraints     7
_refine_ls_restrained_S_all      1.796
_refine_ls_R_factor_all          0.1549
_refine_ls_R_factor_gt           0.1291
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3975
_refine_ls_wR_factor_ref         0.4262
_reflns_number_gt                6614
_reflns_number_total             8931
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0ob00044b.txt
_cod_data_source_block           90916mae
_cod_original_cell_volume        4558.3(16)
_cod_original_sg_symbol_Hall     '-P 2yc'
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7153419