[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_1507689
_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 O'
_chemical_formula_weight         525.53
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                   15.4372(6)
_cell_length_b                   18.7975(8)
_cell_length_c                   21.1721(8)
_cell_measurement_reflns_used    9864
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      67.916
_cell_measurement_theta_min      4.176
_cell_volume                     6143.7(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0436
_diffrn_reflns_av_sigmaI/netI    0.0240
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            52153
_diffrn_reflns_theta_full        68.25
_diffrn_reflns_theta_max         68.29
_diffrn_reflns_theta_min         4.18
_exptl_absorpt_coefficient_mu    0.536
_exptl_absorpt_correction_T_max  0.9336
_exptl_absorpt_correction_T_min  0.8912
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker Sadabs'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.136
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             2272
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.706
_refine_diff_density_min         -0.339
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.822
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     392
_refine_ls_number_reflns         5624
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.822
_refine_ls_R_factor_all          0.0597
_refine_ls_R_factor_gt           0.0527
_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^)+(0.0780P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1719
_refine_ls_wR_factor_ref         0.1765
_reflns_number_gt                4926
_reflns_number_total             5624
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol300851m_si_006.cif
_cod_data_source_block           em64_43_0m
_cod_database_code               1507689