[3 + 2]-dipolar cycloaddition reactions of an N-heterocyclic carbene boryl azide.
Merling, Everett; Lamm, Vladimir; Geib, Steven J.; Lacôte, Emmanuel; Curran, Dennis P.; Organic letters 14 (2012) 2690–2693; doi:10.1021/ol300851m

data_1507685
_publ_section_title
;
 [3 + 2]-dipolar cycloaddition reactions of an N-heterocyclic carbene
 boryl azide.
;
_journal_issue                   11
_journal_name_full               'Organic letters'
_journal_page_first              2690
_journal_page_last               2693
_journal_paper_doi               10.1021/ol300851m
_journal_volume                  14
_journal_year                    2012
_chemical_formula_sum            'C32 H44 B N5 O2'
_chemical_formula_weight         541.53
_space_group_IT_number           88
_symmetry_cell_setting           tetragonal
_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     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            16
_cell_length_a                   31.319(3)
_cell_length_b                   31.319(3)
_cell_length_c                   13.7184(19)
_cell_measurement_reflns_used    9999
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      25.25
_cell_measurement_theta_min      2.56
_cell_volume                     13456(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker Smart Apex CCD'
_diffrn_measurement_method       'omega scans'
_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  0.0700
_diffrn_reflns_av_sigmaI/netI    0.0561
_diffrn_reflns_limit_h_max       33
_diffrn_reflns_limit_h_min       -37
_diffrn_reflns_limit_k_max       37
_diffrn_reflns_limit_k_min       -37
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            30445
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.84
_exptl_absorpt_coefficient_mu    0.067
_exptl_absorpt_correction_T_max  0.92
_exptl_absorpt_correction_T_min  0.84
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker Sadabs'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.069
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             4672
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.18
_platon_squeeze_details
;
;
_refine_diff_density_max         0.216
_refine_diff_density_min         -0.140
_refine_diff_density_rms         0.031
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.987
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     390
_refine_ls_number_reflns         5931
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.987
_refine_ls_R_factor_all          0.0858
_refine_ls_R_factor_gt           0.0530
_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^)+(0.0780P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1345
_refine_ls_wR_factor_ref         0.1502
_reflns_number_gt                3774
_reflns_number_total             5931
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol300851m_si_002.cif
_cod_data_source_block           everetts
_cod_original_sg_symbol_H-M      'I 41/a'
_cod_database_code               1507685