Primary amido substituted diborane4 compounds and imidodiborate4 anions.
Baber, R. Angharad; Charmant, Jonathan P. H.; Cook, Alistair J. R.; Farthing, Natalie E.; Haddow, Mairi F.; Norman, Nicholas C.; Orpen, A. Guy; Russell, Christopher A.; Slattery, John M.; Dalton transactions (Cambridge, England : 2003)  (2005) 3137–3139; doi:10.1039/b509653g

data_7008835
_publ_section_title
;
 Primary amido substituted diborane4 compounds and imidodiborate4
 anions.
;
_journal_issue                   19
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3137
_journal_page_last               3139
_journal_paper_doi               10.1039/b509653g
_journal_year                    2005
_chemical_formula_moiety         'C32 H40 B2 N4'
_chemical_formula_sum            'C32 H40 B2 N4'
_chemical_formula_weight         502.30
_space_group_IT_number           56
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ab 2ac'
_symmetry_space_group_name_H-M   'P c c n'
_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                   19.740(4)
_cell_length_b                   8.8681(18)
_cell_length_c                   16.550(3)
_cell_measurement_reflns_used    94
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      22.185
_cell_measurement_theta_min      2.462
_cell_volume                     2897.2(10)
_computing_cell_refinement       'Bruker SMART V5.054 (Bruker, 1998)'
_computing_data_collection       'Bruker SMART V5.054 (Bruker, 1998)'
_computing_data_reduction        'Bruker SAINT V6.0 (Bruker, 1998)'
_computing_molecular_graphics    'Bruker SHELXTL V6.1 (Bruker AXS, 2000)'
_computing_publication_material  'Bruker SHELXTL V6.1 (Bruker AXS, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 8.5
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0599
_diffrn_reflns_av_sigmaI/netI    0.0434
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            19501
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.06
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.067
_exptl_absorpt_correction_T_max  1.000000
_exptl_absorpt_correction_T_min  0.891152
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2.05 (Bruker AXS, 2001)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.152
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1080
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.343
_refine_diff_density_min         -0.236
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     184
_refine_ls_number_reflns         3334
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.0790
_refine_ls_R_factor_gt           0.0545
_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^)+(0.0366P)^2^+1.8282P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1107
_refine_ls_wR_factor_ref         0.1221
_reflns_number_gt                2499
_reflns_number_total             3334
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b509653g.txt
_cod_data_source_block           3
_cod_original_cell_volume        2897.1(10)
_cod_database_code               7008835