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_4076736
_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            'C25 H34 B2 O4'
_chemical_formula_weight         420.14
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 109.5710(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.4680(2)
_cell_length_b                   14.3490(3)
_cell_length_c                   14.2030(3)
_cell_measurement_reflns_used    2273
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      27.90
_cell_measurement_theta_min      2.84
_cell_volume                     2394.17(8)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR-97
_diffrn_ambient_temperature      110(2)
_diffrn_detector_area_resol_mean '56 microns'
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_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    0.0397
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            2854
_diffrn_reflns_theta_full        27.90
_diffrn_reflns_theta_max         27.90
_diffrn_reflns_theta_min         2.84
_exptl_absorpt_coefficient_mu    0.076
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.166
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prisms
_exptl_crystal_F_000             904
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.349
_refine_diff_density_min         -0.261
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.016
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     145
_refine_ls_number_reflns         2854
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.016
_refine_ls_R_factor_all          0.0579
_refine_ls_R_factor_gt           0.0424
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0577P)^2^+1.4950P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1048
_refine_ls_wR_factor_ref         0.1136
_reflns_number_gt                2273
_reflns_number_total             2854
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om011012b.cif
_cod_data_source_block           5a
_cod_original_cell_volume        2394.16(8)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               4076736