Boron di- and tri-cations
Vargas-Baca, Ignacio; Findlater, Michael; Powell, Adam; Vasudevan, Kalyan V.; Cowley, Alan H.; Dalton Transactions  (2008) 6421–6426; doi:10.1039/b810575h

data_7004692
_publ_section_title
;
 Boron di- and tri-cations
;
_journal_issue                   45
_journal_name_full               'Dalton Transactions'
_journal_page_first              6421
_journal_page_last               6426
_journal_paper_doi               10.1039/b810575h
_journal_year                    2008
_chemical_formula_moiety         'C3 H9 B Br3 N'
_chemical_formula_sum            'C3 H9 B Br3 N'
_chemical_formula_weight         309.65
_space_group_IT_number           11
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yb'
_symmetry_space_group_name_H-M   'P 1 21/m 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'SHELXTL Ver. 6.10'
_cell_angle_alpha                90.000(5)
_cell_angle_beta                 115.211(5)
_cell_angle_gamma                90.000(5)
_cell_formula_units_Z            2
_cell_length_a                   6.626(5)
_cell_length_b                   10.493(5)
_cell_length_c                   6.810(5)
_cell_measurement_temperature    153(2)
_cell_volume                     428.4(5)
_computing_cell_refinement       'Collect software, Nonius B.V. 1998'
_computing_data_collection       'Collect software, Nonius B.V. 1998'
_computing_data_reduction
;
DENZO and Scalepack (Otwinoski and Minor, 1997)
;
_computing_molecular_graphics    'XP SHELXTL/PC, Siemens Analytical'
_computing_structure_refinement  'XL SHELXTL/PC, Siemens Analytical'
_computing_structure_solution
;
SIR97 - Altomare A., Burla M.C., Camalli M., Cascarano G.L., Giacovazzo C.,
Guagliardi A., Moliterni A.G.G., Polidori G.,Spagna R.
;
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       \w-scan
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0337
_diffrn_reflns_av_sigmaI/netI    0.0476
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            1631
_diffrn_reflns_theta_full        27.38
_diffrn_reflns_theta_max         27.38
_diffrn_reflns_theta_min         3.31
_exptl_absorpt_coefficient_mu    14.037
_exptl_absorpt_correction_T_max  .122
_exptl_absorpt_correction_T_min  .060
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'DENZO and Scalepack (Otwinoski and Minor, 1997)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.401
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             288
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.680
_refine_diff_density_min         -1.300
_refine_diff_density_rms         0.213
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.920
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     43
_refine_ls_number_reflns         1023
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.920
_refine_ls_R_factor_all          0.0458
_refine_ls_R_factor_gt           0.0364
_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^)+(0.0559P)^2^+0.9736P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0862
_refine_ls_wR_factor_ref         0.0925
_reflns_number_gt                871
_reflns_number_total             1023
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b810575h.txt
_cod_data_source_block           ccdkvap075x
_cod_original_sg_symbol_Hall     -p2yb
_cod_original_sg_symbol_H-M      p21/m
_cod_database_code               7004692