Studies of the reactivity of N-heterocyclic carbenes with halogen and halide sources
Cole, Marcus L.; Jones, Cameron; Junk, Peter C.; New Journal of Chemistry 26 (2002) 1296–; doi:10.1039/b204422f

data_7050935
_publ_section_title
;
 Studies of the reactivity of N-heterocyclic carbenes with halogen and
 halide sources
;
_journal_issue                   10
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              1296
_journal_paper_doi               10.1039/b204422f
_journal_volume                  26
_journal_year                    2002
_chemical_formula_sum            'C21 H22 Br2 N2'
_chemical_formula_weight         462.23
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 114.275(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.4179(12)
_cell_length_b                   14.8370(16)
_cell_length_c                   13.4527(14)
_cell_measurement_temperature    296(2)
_cell_volume                     2077.5(4)
_computing_cell_refinement       'SAINT (Bruker, 1998)'
_computing_data_collection       'SMART (Bruker, 1998)'
_computing_data_reduction        'SAINT (Bruker, 1998)'
_computing_molecular_graphics    'X-Seed (Barbour, 1999)'
_computing_publication_material  'CIFTAB (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART 1000 CCD diffractometer'
_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  0.0905
_diffrn_reflns_av_sigmaI/netI    0.0705
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            9289
_diffrn_reflns_theta_full        23.28
_diffrn_reflns_theta_max         23.28
_diffrn_reflns_theta_min         1.98
_diffrn_standards_decay_%        0.0
_exptl_absorpt_coefficient_mu    3.908
_exptl_absorpt_correction_T_max  0.3417
_exptl_absorpt_correction_T_min  0.3417
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_density_diffrn    1.478
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             928
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.35
_refine_diff_density_max         0.666
_refine_diff_density_min         -0.803
_refine_diff_density_rms         0.111
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.934
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     232
_refine_ls_number_reflns         2995
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.934
_refine_ls_R_factor_all          0.0799
_refine_ls_R_factor_gt           0.0579
_refine_ls_shift/su_max          0.051
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0995P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1418
_refine_ls_wR_factor_ref         0.1553
_reflns_number_gt                2061
_reflns_number_total             2995
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b204422f.txt
_cod_data_source_block           compound4
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7050935