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_7046272
_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         'C70 H108 B2 Mg2 N4 O4'
_chemical_formula_sum            'C70 H108 B2 Mg2 N4 O4'
_chemical_formula_weight         1139.84
_chemical_name_systematic
;
 ?
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     iterative
_audit_creation_date             2017-02-08
_audit_creation_method
;
Olex2 1.2
(compiled 2017.01.04 svn.r3372 for OlexSys, GUI svn.r5292)
;
_audit_update_record
;
2018-02-19 deposited with the CCDC.
2018-05-09 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 104.841(1)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   22.6369(3)
_cell_length_b                   12.3776(2)
_cell_length_c                   25.1115(3)
_cell_measurement_reflns_used    17579
_cell_measurement_temperature    150.00(10)
_cell_measurement_theta_max      73.3160
_cell_measurement_theta_min      3.6420
_cell_volume                     6801.28(17)
_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      150.00(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 0.997
_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  0.0837
_diffrn_reflns_av_unetI/netI     0.0401
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            113576
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         73.586
_diffrn_reflns_theta_min         3.642
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.681
_exptl_absorpt_correction_T_max  0.995
_exptl_absorpt_correction_T_min  0.989
_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    1.113
_exptl_crystal_description       block
_exptl_crystal_F_000             2488
_exptl_crystal_size_max          0.167
_exptl_crystal_size_mid          0.089
_exptl_crystal_size_min          0.064
_refine_diff_density_max         0.256
_refine_diff_density_min         -0.241
_refine_diff_density_rms         0.040
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     775
_refine_ls_number_reflns         13681
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.0607
_refine_ls_R_factor_gt           0.0422
_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^)+(0.0502P)^2^+1.5732P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0989
_refine_ls_wR_factor_ref         0.1085
_reflns_Friedel_coverage         0.000
_reflns_number_gt                10621
_reflns_number_total             13681
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt01451e2.cif
_cod_data_source_block           s17msh13
_cod_database_code               7046272
_shelxl_version_number           2014-3
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C12(H12), C15(H15), C24(H24), C27(H27), C53(H53), C56(H56), C65(H65), C68(H68)
2.b Aromatic/amide H refined with riding coordinates:
 C3(H3), C8(H8), C9(H9), C10(H10), C20(H20), C21(H21), C22(H22), C44(H44),
 C49(H49), C50(H50), C51(H51), C61(H61), C62(H62), C63(H63)
2.c 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), C32(H32A,H32B,H32C), C33(H33A,
 H33B,H33C), C34(H34A,H34B,H34C), C35(H35A,H35B,H35C), C38(H38A,H38B,H38C),
 C39(H39A,H39B,H39C), C40(H40A,H40B,H40C), C41(H41A,H41B,H41C), C42(H42A,H42B,
 H42C), C46(H46A,H46B,H46C), C54(H54A,H54B,H54C), C55(H55A,H55B,H55C), C57(H57A,
 H57B,H57C), C58(H58A,H58B,H58C), C66(H66A,H66B,H66C), C67(H67A,H67B,H67C),
 C69(H69A,H69B,H69C), C70(H70A,H70B,H70C)
;
_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 2.413
_oxdiff_exptl_absorpt_empirical_full_min 0.589