Synthesis and characterization of cationic selenium–nitrogen heterocycles from tert-butyl-DAB (DAB = 1,4-di-tert-butyl-1,3-diazabutadiene) and SeX4via the reductive elimination of X2 (X = Cl, Br): a distinct contrast with tellurium
Dutton, Jason L.; Sutrisno, Andre; Schurko, Robert W.; Ragogna, Paul J.; Dalton Transactions  (2008) 3470–3477; doi:10.1039/b719779a

data_7003801
_publ_section_title
;
 Synthesis and characterization of cationic selenium--nitrogen
 heterocycles from tert-butyl-DAB (DAB =
 1,4-di-tert-butyl-1,3-diazabutadiene) and SeX4via the reductive
 elimination of X2 (X = Cl, Br): a distinct contrast with tellurium
;
_journal_issue                   26
_journal_name_full               'Dalton Transactions'
_journal_page_first              3470
_journal_page_last               3477
_journal_paper_doi               10.1039/b719779a
_journal_year                    2008
_chemical_formula_sum            'C6 H11 Br N2 Se'
_chemical_formula_weight         270.04
_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                 104.47(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.7366(19)
_cell_length_b                   9.3214(19)
_cell_length_c                   10.070(2)
_cell_measurement_reflns_used    2112
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      1.70
_cell_volume                     884.9(3)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1997-2001)'
_computing_data_reduction        DENZO-SMN
_computing_molecular_graphics    'SHELXTL/PC (Sheldrick, 2001)'
_computing_publication_material  SHELXTL/PC
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full .995
_diffrn_measured_fraction_theta_max .995
_diffrn_measurement_device_type  'Nonius Kappa-CCD'
_diffrn_measurement_method       '\f scans, and \w scans with \k offsets'
_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  0.0634
_diffrn_reflns_av_sigmaI/netI    0.0688
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3767
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         2.16
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    8.689
_exptl_absorpt_correction_T_max  0.3556
_exptl_absorpt_correction_T_min  0.2754
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO-SMN (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            block
_exptl_crystal_density_diffrn    2.027
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       yellow
_exptl_crystal_F_000             520
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.15
_refine_diff_density_max         1.146
_refine_diff_density_min         -1.235
_refine_diff_density_rms         .224
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.074
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     94
_refine_ls_number_reflns         2022
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.074
_refine_ls_R_factor_all          0.0652
_refine_ls_R_factor_gt           0.0487
_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^)+(0.0721P)^2^+0.4337P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1254
_refine_ls_wR_factor_ref         0.1323
_reflns_number_gt                1600
_reflns_number_total             2022
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b719779a.txt
_cod_data_source_block           06095
_cod_original_cell_volume        885.0(3)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7003801