In Search of the [PhB(μ-NtBu)2]2As. Radical: Experimental and Computational Investigations of the Redox Chemistry of Group 15 Bis-boraamidinates
Jari Konu; Heikki M. Tuononen; Tristram Chivers; Andrea M. Corrente; René T. Boeré; Tracey L. Roemmele; Inorganic Chemistry 47 (2008) 3823–3831; doi:10.1021/ic702435e

data_4304850
_publ_contact_author             'Professor Tristram Chivers'
_publ_contact_author_email       chivers@ucalgary.ca
_publ_section_title
;
In Search of the [PhB(\m-NtBu)2]2As. Radical: Experimental and
Computational Investigations of the Redox Chemistry of Group 15
Bis-boraamidinates
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              3823
_journal_page_last               3831
_journal_paper_doi               10.1021/ic702435e
_journal_volume                  47
_journal_year                    2008
_chemical_formula_moiety         'C28 H46 As B2 N4, Cl4 Ga'
_chemical_formula_sum            'C28 H46 As B2 Cl4 Ga N4'
_chemical_formula_weight         746.75
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 91.31(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   10.690(2)
_cell_length_b                   37.733(8)
_cell_length_c                   18.605(4)
_cell_measurement_reflns_used    22880
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.03
_cell_measurement_theta_min      2.18
_cell_volume                     7503(3)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction        DENZO-SMN
_computing_molecular_graphics    'DIAMOND (Brandenburg & Berndt, 1999)'
_computing_publication_material  'WinGX v1.70-01 (L. J. Farrugia)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'KappaCCD (Nonius, FR540C)'
_diffrn_measurement_method       'phi\omega scans'
_diffrn_radiation_monochromator  'horizonally mounted graphite crystal'
_diffrn_radiation_source         'Enraf Nonius FR590D, fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0511
_diffrn_reflns_av_sigmaI/netI    0.0741
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       44
_diffrn_reflns_limit_k_min       -44
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            22880
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.18
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.917
_exptl_absorpt_correction_T_max  0.8618
_exptl_absorpt_correction_T_min  0.7005
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'SADABS (SHELXTL-NT v5.1, Bruker)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.322
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3072
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.062
_refine_diff_density_min         -0.772
_refine_diff_density_rms         0.087
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.015
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     734
_refine_ls_number_reflns         13105
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.015
_refine_ls_R_factor_all          0.1046
_refine_ls_R_factor_gt           0.0598
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0543P)^2^+20.1243P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1293
_refine_ls_wR_factor_ref         0.1494
_reflns_number_gt                8641
_reflns_number_total             13105
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic702435e-file002_4.cif
_cod_data_source_block           compound_4
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4304850