From C,N- and N,N-chelated chloroboranes to substituted 1H-2,1-benzazaboroles and 1H-pyrrolo[1,2-c][1,3,2]diazaborolidines: a straightforward route to five-membered rings containing the B-N or N-B-N moiety.
Hejda, Martin; Lyčka, Antonín; Jambor, Roman; R°užička, Aleš; Dostál, Libor; Dalton transactions (Cambridge, England : 2003) 43 (2014) 12678–12688; doi:10.1039/c4dt01445f

data_7031465
_publ_section_title
;
 From C,N- and N,N-chelated chloroboranes to substituted
 1H-2,1-benzazaboroles and 1H-pyrrolo[1,2-c][1,3,2]diazaborolidines: a
 straightforward route to five-membered rings containing the B-N or N-B-N
 moiety.
;
_journal_issue                   33
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              12678
_journal_page_last               12688
_journal_paper_doi               10.1039/c4dt01445f
_journal_volume                  43
_journal_year                    2014
_chemical_formula_moiety         'C19 H22 B Cl2 N, C H2 Cl2'
_chemical_formula_sum            'C20 H24 B Cl4 N'
_chemical_formula_weight         431.01
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_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   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90
_cell_angle_beta                 108.492(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.3332(4)
_cell_length_b                   13.0120(2)
_cell_length_c                   14.1703(4)
_cell_measurement_reflns_used    18862
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      1
_cell_volume                     2156.63(11)
_computing_cell_refinement       'COLLECT and DENZO'
_computing_data_collection
'COLLECT (Hooft, 1998) and DENZO (Otwinowski & Minor, 1997)'
_computing_data_reduction        'COLLECT and DENZO'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150(1)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'Bruker Nonius KappaCCD area detector'
_diffrn_measurement_method       '\f and \w scans to fill the Ewald sphere'
_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  0.0492
_diffrn_reflns_av_unetI/netI     0.0392
_diffrn_reflns_Laue_measured_fraction_full 0.986
_diffrn_reflns_Laue_measured_fraction_max 0.985
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            18640
_diffrn_reflns_point_group_measured_fraction_full 0.986
_diffrn_reflns_point_group_measured_fraction_max 0.985
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.499
_diffrn_reflns_theta_min         2.341
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.553
_exptl_absorpt_correction_T_max  0.928
_exptl_absorpt_correction_T_min  0.824
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
;
Gaussian integration (Coppens, 1970)
;
_exptl_crystal_colour            'light yellow'
_exptl_crystal_density_diffrn    1.327
_exptl_crystal_description       block
_exptl_crystal_F_000             896
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.235
_refine_diff_density_min         -0.866
_refine_diff_density_rms         0.109
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         4874
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0970
_refine_ls_R_factor_gt           0.0756
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0675P)^2^+10.7607P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1820
_refine_ls_wR_factor_ref         0.1998
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3863
_reflns_number_total             4874
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4dt01445f2.cif
_cod_data_source_block           shelxl
_cod_depositor_comments
'Adding full bibliography for 7031456--7031465.cif.'
_cod_database_code               7031465
_shelxl_version_number           2013-4
_shelx_res_checksum              31707