Synthesis and structure of a magnesium-amidoborane complex and its role in catalytic formation of a new bis-aminoborane ligand.
Spielmann, Jan; Bolte, Michael; Harder, Sjoerd; Chemical communications (Cambridge, England)  (2009) 6934–6936; doi:10.1039/b914979a

data_7105044
_publ_section_title
;
 Synthesis and structure of a magnesium-amidoborane complex and its
 role in catalytic formation of a new bis-aminoborane ligand.
;
_journal_issue                   45
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              6934
_journal_page_last               6936
_journal_paper_doi               10.1039/b914979a
_journal_year                    2009
_chemical_formula_sum            'C41 H62 B Mg N3'
_chemical_formula_weight         632.06
_chemical_name_common            (DIPP-nacnac)MgNH(DIPP)BH3
_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                 103.004(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.295(4)
_cell_length_b                   11.8119(14)
_cell_length_c                   18.846(3)
_cell_measurement_reflns_used    5027
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      23.1
_cell_measurement_theta_min      3.6
_cell_volume                     3968.2(12)
_computing_cell_refinement       'X-Area (Stoe & Cie, 2001)'
_computing_data_collection       'X-Area (Stoe & Cie, 2001)'
_computing_data_reduction        'X-Area (Stoe & Cie, 2001)'
_computing_molecular_graphics    'XP in SHELXTL-Plus (Sheldrick, 1991)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'STOE IPDS II two-circle-diffractometer'
_diffrn_measurement_method       \w
_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  0.1089
_diffrn_reflns_av_sigmaI/netI    0.2507
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            17455
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         3.53
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  0.9882
_exptl_absorpt_correction_T_min  0.9860
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'MULABS (Spek, 2003; Blessing, 1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.058
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1384
_exptl_crystal_size_max          0.19
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.342
_refine_diff_density_min         -0.296
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.874
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     421
_refine_ls_number_reflns         6903
_refine_ls_number_restraints     8
_refine_ls_restrained_S_all      0.880
_refine_ls_R_factor_all          0.2345
_refine_ls_R_factor_gt           0.0924
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0769P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1824
_refine_ls_wR_factor_ref         0.2375
_reflns_number_gt                2340
_reflns_number_total             6903
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b914979a.txt
_cod_data_source_block           harder4
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7105044