Metal-free dehydrogenation of amine-boranes by an N-heterocyclic carbene.
Sabourin, Kyle J.; Malcolm, Adam C.; McDonald, Robert; Ferguson, Michael J.; Rivard, Eric; Dalton transactions (Cambridge, England : 2003) 42 (2013) 4625–4632; doi:10.1039/c3dt32988g

data_7022760
_publ_section_title
;
 Metal-free dehydrogenation of amine-boranes by an N-heterocyclic carbene.
;
_journal_issue                   13
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              4625
_journal_page_last               4632
_journal_paper_doi               10.1039/c3dt32988g
_journal_volume                  42
_journal_year                    2013
_chemical_formula_moiety         'C33 H32 B N, C2 H4 Cl2'
_chemical_formula_sum            'C35 H36 B Cl2 N'
_chemical_formula_weight         552.36
_chemical_name_common            7
_chemical_name_systematic
;
?
;
_space_group_IT_number           135
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-P 4c 2ab'
_symmetry_space_group_name_H-M   'P 42/m b c'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   17.2578(2)
_cell_length_b                   17.2578(2)
_cell_length_c                   20.4652(3)
_cell_measurement_reflns_used    9632
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      70.05
_cell_measurement_theta_min      3.62
_cell_volume                     6095.18(13)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXD (Schneider & Sheldrick, 2002)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.962
_diffrn_measured_fraction_theta_max 0.958
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0180
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            39954
_diffrn_reflns_theta_full        67.80
_diffrn_reflns_theta_max         70.73
_diffrn_reflns_theta_min         3.62
_exptl_absorpt_coefficient_mu    2.082
_exptl_absorpt_correction_T_max  0.7536
_exptl_absorpt_correction_T_min  0.6053
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.204
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2336
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.593
_refine_diff_density_min         -0.755
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_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     206
_refine_ls_number_reflns         2898
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0471
_refine_ls_R_factor_gt           0.0457
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0746P)^2^+2.8937P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1334
_refine_ls_wR_factor_ref         0.1351
_reflns_number_gt                2758
_reflns_number_total             2898
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c3dt32988g.txt
_cod_data_source_block           riv1208
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_database_code               7022760
_diffrn_reflns_av_unetl/netl     0.0087