Unsymmetrical diborane(4) derivatives by copper mediated B-B coupling.
Oschmann, W.; Borner, C.; Kleeberg, C.; Dalton transactions (Cambridge, England : 2003) 47 (2018) 5318–5327; doi:10.1039/c8dt00627j

data_7045947
_publ_section_title
;
 Unsymmetrical diborane(4) derivatives by copper mediated B-B coupling.
;
_journal_issue                   15
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              5318
_journal_page_last               5327
_journal_paper_doi               10.1039/c8dt00627j
_journal_volume                  47
_journal_year                    2018
_chemical_formula_moiety         'C10 H22 B2 N2 O2'
_chemical_formula_sum            'C10 H22 B2 N2 O2'
_chemical_formula_weight         223.91
_space_group_crystal_system      orthorhombic
_space_group_IT_number           62
_space_group_name_Hall           '-P 2ac 2n'
_space_group_name_H-M_alt        'P n m a'
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2017/1
_audit_update_record
;
2018-01-30 deposited with the CCDC.
2018-03-13 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.7413(4)
_cell_length_b                   11.8768(6)
_cell_length_c                   14.9725(6)
_cell_measurement_reflns_used    6485
_cell_measurement_temperature    235(2)
_cell_measurement_theta_max      25.80
_cell_measurement_theta_min      2.96
_cell_volume                     1376.60(11)
_computing_cell_refinement
;
 CrysAlisPro 1.171.38.43 (Rigaku Oxford Diffraction, 2015)
;
_computing_data_collection
;
 CrysAlisPro 1.171.38.43 (Rigaku Oxford Diffraction, 2015)
;
_computing_data_reduction
;
 CrysAlisPro 1.171.38.43 (Rigaku Oxford Diffraction, 2015)
;
_computing_molecular_graphics
;
 K. Brandenburg, 2017, Diamond 4.4.1, Crystal Impact GbR, Bonn, Germany.
;
_computing_publication_material
;
 WinGX v2014.1 (L. J. Farrugia, J. Appl. Cryst., 2012, 45, 849-854.)
;
_computing_structure_refinement
;
 SHELXL-2017/1 (G. M. Sheldrick, Acta Cryst., 2015, A71, 3--8)
;
_computing_structure_solution
;
 SIR-92 (A. Altomare, G. Cascarano, C. Giacovazzo, A. Guagliardi, M. C. Burla,
         G. Polidori and M. Camalli, J. Appl. Crystallogr., 1994, 27, 435.)
;
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      235(2)
_diffrn_detector_area_resol_mean 16.1419
_diffrn_detector_type            EOS
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Oxford Diffraction, Xcalibur, EOS'
_diffrn_measurement_method       \w-scan
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0344
_diffrn_reflns_av_unetI/netI     0.0101
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            25115
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.022
_diffrn_reflns_theta_max         25.022
_diffrn_reflns_theta_min         2.721
_exptl_absorpt_coefficient_mu    0.072
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.94523
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 CrysAlisPro 1.171.38.43 (Rigaku Oxford Diffraction, 2015)
 Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.080
_exptl_crystal_description       irregular
_exptl_crystal_F_000             488
_exptl_crystal_recrystallization_method
;
 pinB-BMeEn was crystallised in situ. Pure pinB-BMeEn (approx. 0.8 /mL)
 was enclosed in a glass capillary of 0.4 mm outer diameter. The capillary 
 was flame sealed and glued into a brass pin that was mounted on the 
 goniometer head. A part of the capillary filled with pinB-BMeEn was centred
 in the X-ray beam (0.5 mm dia.). The axis of the capillary was aligned 
 perpendicular to the X-ray beam.

 The temperature was gradually (within 3 h) lowered from rt to 248 K and kept 
 at this temperature for 20 h. Whereupon the pinB-BMeEn crystallised upon
 shock-cooling with a piece of paper cooled with liquid nitrogen.
 Sequences of cooling to 248 K, annealing, shock-cooling and reheating were 
 repeated until the diffraction pattern indicated that a reasonably
 single crystalline sample had formed. 
 Finally the temperature was lowered to 235 K for the data collection.
;
_exptl_crystal_size_max          0.8
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.4
_refine_diff_density_max         0.203
_refine_diff_density_min         -0.131
_refine_diff_density_rms         0.026
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.103
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     111
_refine_ls_number_reflns         1276
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.103
_refine_ls_R_factor_all          0.0550
_refine_ls_R_factor_gt           0.0479
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0659P)^2^+0.2750P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1311
_refine_ls_wR_factor_ref         0.1369
_reflns_number_gt                1102
_reflns_number_total             1276
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt00627j2.cif
_cod_data_source_block           ck68ck_235K
_cod_depositor_comments
'Adding full bibliography for 7045941--7045953.cif.'
_cod_database_code               7045947
_shelx_shelxl_version_number     2017/1
_shelx_res_checksum              18678