Large Stokes shift induced by intramolcular charge transfer in N,O-chelated naphthyridine-BF2 complexes.
Wu, Yun-Ying; Chen, Yong; Gou, Gao-Zhang; Mu, Wei-Hua; Lv, Xiao-Jun; Du, Mei-Ling; Fu, Wen-Fu; Organic letters 14 (2012) 5226–5229; doi:10.1021/ol302347m

data_1508678
_publ_section_title
;
 Large Stokes shift induced by intramolcular charge transfer in
 N,O-chelated naphthyridine-BF2 complexes.
;
_journal_issue                   20
_journal_name_full               'Organic letters'
_journal_page_first              5226
_journal_page_last               5229
_journal_paper_doi               10.1021/ol302347m
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         'C17 H14 B F2 N3 O'
_chemical_formula_sum            'C17 H14 B F2 N3 O'
_chemical_formula_weight         325.12
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 94.98(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   18.636(4)
_cell_length_b                   10.788(2)
_cell_length_c                   15.333(3)
_cell_measurement_reflns_used    9670
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.460
_cell_measurement_theta_min      3.305
_cell_volume                     3071.0(11)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detectoor'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0306
_diffrn_reflns_av_sigmaI/netI    0.0237
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            14552
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         3.30
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'light yellow'
_exptl_crystal_density_diffrn    1.406
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1344
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.218
_refine_diff_density_min         -0.195
_refine_diff_density_rms         0.037
_refine_ls_extinction_coef       0.0025(6)
_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   1.085
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         3492
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0461
_refine_ls_R_factor_gt           0.0387
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0587P)^2^+0.9651P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1081
_refine_ls_wR_factor_ref         0.1145
_reflns_number_gt                2904
_reflns_number_total             3492
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol302347m_si_003.cif
_cod_data_source_block           1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_cell_volume        3071.1(11)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1508678