Novel C1-Bridged Bisboronate Derivatives by Insertion of Diazoalkanes into Bis(pinacolato)diborane(4)⊥
Abu Ali, Hijazi; Goldberg, Israel; Kaufmann, Dieter; Burmeister, Christian; Srebnik, Morris; Organometallics 21 (2002) 1870–; doi:10.1021/om011012b

data_4076737
_publ_section_title
;
 Novel C1-Bridged Bisboronate Derivatives by Insertion of Diazoalkanes
 into Bis(pinacolato)diborane(4)&#x22A5;
;
_journal_issue                   9
_journal_name_full               Organometallics
_journal_page_first              1870
_journal_paper_doi               10.1021/om011012b
_journal_volume                  21
_journal_year                    2002
_chemical_formula_sum            'C20 H32 B2 O4'
_chemical_formula_weight         358.08
_space_group_IT_number           14
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 117.2450(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.0510(2)
_cell_length_b                   14.5220(2)
_cell_length_c                   12.4110(2)
_cell_measurement_reflns_used    4834
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      27.88
_cell_measurement_theta_min      2.81
_cell_volume                     2091.25(6)
_computing_cell_refinement       Denzo
_computing_data_collection       'Collect, Nonius B.V.'
_computing_data_reduction        Denzo
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR-92
_diffrn_ambient_temperature      110(2)
_diffrn_detector_area_resol_mean '56 microns'
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.970
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '1 deg. Phi 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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0358
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            4834
_diffrn_reflns_theta_full        27.88
_diffrn_reflns_theta_max         27.88
_diffrn_reflns_theta_min         2.81
_exptl_absorpt_coefficient_mu    0.075
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.137
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prisms
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.315
_refine_diff_density_min         -0.231
_refine_diff_density_rms         0.038
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     244
_refine_ls_number_reflns         4834
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.0547
_refine_ls_R_factor_gt           0.0409
_refine_ls_shift/su_max          0.015
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0430P)^2^+0.7886P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0959
_refine_ls_wR_factor_ref         0.1037
_reflns_number_gt                3964
_reflns_number_total             4834
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om011012b.cif
_cod_data_source_block           5c
_cod_original_cell_volume        2091.25(5)
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               4076737