Lewis acid effects on donor–acceptor associations and redox reactions: ternary complexes of heteroaromatic N-oxides with boron trifluoride and organic donors
Nizhnik, Yakov P.; Lu, Jianjiang; Rosokha, Sergiy V.; Kochi, Jay K.; New Journal of Chemistry 33 (2009) 2317–; doi:10.1039/b9nj00205g

data_7054143
_publ_section_title
;
 Lewis acid effects on donor--acceptor associations and redox reactions:
 ternary complexes of heteroaromatic N-oxides with boron trifluoride and
 organic donors
;
_journal_issue                   11
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              2317
_journal_paper_doi               10.1039/b9nj00205g
_journal_volume                  33
_journal_year                    2009
_chemical_formula_sum            'C5 H4 B F3 N2 O3'
_chemical_formula_weight         207.91
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.996(3)
_cell_length_b                   6.0475(13)
_cell_length_c                   11.156(2)
_cell_measurement_reflns_used    301
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      22.38
_cell_measurement_theta_min      3.37
_cell_volume                     809.3(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.962
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and 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  0.0474
_diffrn_reflns_av_sigmaI/netI    0.0506
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            7360
_diffrn_reflns_theta_full        29.50
_diffrn_reflns_theta_max         30.64
_diffrn_reflns_theta_min         3.37
_exptl_absorpt_coefficient_mu    0.177
_exptl_absorpt_correction_T_max  0.9860
_exptl_absorpt_correction_T_min  0.9655
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.706
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             416
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.248
_refine_diff_density_min         -0.235
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1.1(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.004
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     127
_refine_ls_number_reflns         2319
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.004
_refine_ls_R_factor_all          0.0798
_refine_ls_R_factor_gt           0.0493
_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^)+(0.0387P)^2^+0.1787P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0919
_refine_ls_wR_factor_ref         0.1057
_reflns_number_gt                1643
_reflns_number_total             2319
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b9nj00205g.txt
_cod_data_source_block           yak14
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      'Pca2(1) '
_cod_database_code               7054143