Synthesis and fluorescence properties of novel pyrazine-boron complexes bearing a β-iminoketone ligand.
Kubota, Yasuhiro; Hara, Hiroshi; Tanaka, Syunki; Funabiki, Kazumasa; Matsui, Masaki; Organic letters 13 (2011) 6544–6547; doi:10.1021/ol202819w

data_1502607
_publ_contact_author             'Yasuhiro Kubota'
_publ_section_title
;
 Synthesis and fluorescence properties of novel pyrazine-boron complexes
 bearing a \b-iminoketone ligand.
;
_journal_issue                   24
_journal_name_full               'Organic letters'
_journal_page_first              6544
_journal_page_last               6547
_journal_paper_doi               10.1021/ol202819w
_journal_volume                  13
_journal_year                    2011
_chemical_formula_moiety         'C25 H21 B N2 O'
_chemical_formula_sum            'C25 H21 B N2 O'
_chemical_formula_weight         376.25
_chemical_melting_point          234.5(5)
_chemical_name_common            ' Ph_BPh2 '
_chemical_name_systematic
; 
 phenyl BPh2  
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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                 90.680(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.812(4)
_cell_length_b                   11.747(6)
_cell_length_c                   19.548(10)
_cell_measurement_temperature    293(2)
_cell_volume                     2023.4(17)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Rigaku/MSC Mercury CCD'
_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  0.0242
_diffrn_reflns_av_sigmaI/netI    0.0245
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            15796
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.31
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  0.9852
_exptl_absorpt_correction_T_min  0.9852
_exptl_absorpt_correction_type   integration
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.235
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.187
_refine_diff_density_min         -0.152
_refine_diff_density_rms         0.030
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.105
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     346
_refine_ls_number_reflns         4633
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.105
_refine_ls_R_factor_all          0.0649
_refine_ls_R_factor_gt           0.0519
_refine_ls_shift/su_max          0.053
_refine_ls_shift/su_mean         0.007
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0808P)^2^+0.1168P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1465
_refine_ls_wR_factor_ref         0.1591
_reflns_number_gt                3695
_reflns_number_total             4633
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol202819w_si_002.cif
_cod_data_source_block           7
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '234-235' was changed to '234.5(5)' -
the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1502607