Diborane Heterolysis: Breaking and Making B-B bonds at Magnesium
Hill, Michael; Mahon, Mary F.; Pecharman, Anne-Frederique; Dalton Transactions  (2018) –; doi:10.1039/C8DT01451E

data_7046273
_publ_section_title
;
 Diborane Heterolysis: Breaking and Making B-B bonds at Magnesium
;
_journal_name_full               'Dalton Transactions'
_journal_paper_doi               10.1039/C8DT01451E
_journal_year                    2018
_chemical_formula_moiety         'C47 H77 B3 Mg N2 O6'
_chemical_formula_sum            'C47 H77 B3 Mg N2 O6'
_chemical_formula_weight         822.84
_space_group_crystal_system      tetragonal
_space_group_IT_number           88
_space_group_name_Hall           '-I 4ad'
_space_group_name_H-M_alt        'I 41/a'
_symmetry_space_group_name_Hall  '-I 4ad'
_symmetry_space_group_name_H-M   'I 41/a :2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_audit_creation_date             2017-05-19
_audit_creation_method
;
Olex2 1.2
(compiled 2017.03.28 svn.r3405 for OlexSys, GUI svn.r5337)
;
_audit_update_record
;
2018-02-19 deposited with the CCDC.
2018-05-09 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            16
_cell_length_a                   37.2496(5)
_cell_length_b                   37.2496(5)
_cell_length_c                   14.5258(2)
_cell_measurement_reflns_used    14008
_cell_measurement_temperature    150.01(10)
_cell_measurement_theta_max      72.5320
_cell_measurement_theta_min      3.2730
_cell_volume                     20155.0(5)
_computing_cell_refinement       'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'olex2.solve (Bourhis et al., 2015)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      150.01(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.1150
_diffrn_detector_type            EosS2
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, EosS2'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0586
_diffrn_reflns_av_unetI/netI     0.0382
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       46
_diffrn_reflns_limit_h_min       -43
_diffrn_reflns_limit_k_max       45
_diffrn_reflns_limit_k_min       -45
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            77992
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         73.591
_diffrn_reflns_theta_min         3.266
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.649
_exptl_absorpt_correction_T_max  0.998
_exptl_absorpt_correction_T_min  0.993
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.41 (Rigaku Oxford Diffraction, 2015)
Numerical absorption correction based on gaussian integration over
            a multifaceted crystal model
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.085
_exptl_crystal_description       block
_exptl_crystal_F_000             7168
_exptl_crystal_size_max          0.272
_exptl_crystal_size_mid          0.064
_exptl_crystal_size_min          0.058
_refine_diff_density_max         0.346
_refine_diff_density_min         -0.260
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     569
_refine_ls_number_reflns         10099
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0793
_refine_ls_R_factor_gt           0.0557
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0701P)^2^+11.7348P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1311
_refine_ls_wR_factor_ref         0.1444
_reflns_Friedel_coverage         0.000
_reflns_number_gt                7598
_reflns_number_total             10099
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt01451e2.cif
_cod_data_source_block           s17msh56
_cod_original_cell_volume        20155.0(6)
_cod_database_code               7046273
_shelx_shelxl_version_number     2014/7
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups, All C(H,H,H,H,H,H) groups
2. Restrained distances
 C41-C36 \\sim C41-C36A
 with sigma of 0.005
 C38-C37A \\sim C38-C37
 with sigma of 0.005
 C37A-C36A \\sim C37-C36
 with sigma of 0.005
3. Others
 Fixed Sof: H41A(0.75) H41B(0.75) H41C(0.75) H41D(0.25) H41E(0.25) H41F(0.25)
 C36(0.75) H36(0.75) C37(0.75) H37A(0.75) H37B(0.75) C36A(0.25) H36A(0.25)
 C37A(0.25) H37C(0.25) H37D(0.25)
4.a Ternary CH refined with riding coordinates:
 C12(H12), C15(H15), C24(H24), C27(H27), C30(H30), C36(H36), C36A(H36A)
4.b Secondary CH2 refined with riding coordinates:
 C31(H31A,H31B), C37(H37A,H37B), C37A(H37C,H37D)
4.c Me refined with riding coordinates:
 C41(H41A,H41B,H41C), C41(H41D,H41E,H41F)
4.d Aromatic/amide H refined with riding coordinates:
 C3(H3), C8(H8), C9(H9), C10(H10), C20(H20), C21(H21), C22(H22)
4.e Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C5(H5A,H5B,H5C), C13(H13A,H13B,H13C), C14(H14A,H14B,H14C),
 C16(H16A,H16B,H16C), C17(H17A,H17B,H17C), C25(H25A,H25B,H25C), C26(H26A,H26B,
 H26C), C28(H28A,H28B,H28C), C29(H29A,H29B,H29C), C33(H33A,H33B,H33C), C34(H34A,
 H34B,H34C), C35(H35A,H35B,H35C), C39(H39A,H39B,H39C), C40(H40A,H40B,H40C),
 C44(H44A,H44B,H44C), C45(H45A,H45B,H45C), C46(H46A,H46B,H46C), C47(H47A,H47B,
 H47C)
;
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.607
_oxdiff_exptl_absorpt_empirical_full_min 0.570