Synthesis, Structure, Spirocyclization Mechanism, and Glutathione Peroxidase-like Antioxidant Activity of Stable Spirodiazaselenurane and Spirodiazatellurane
Bani Kanta Sarma; Debasish Manna; Mao Minoura; Govindasamy Mugesh; Journal of the American Chemical Society 132 (2010) 5364–5374; doi:10.1021/ja908080u

data_4102289
_publ_section_title
;
 Synthesis, Structure, Spirocyclization Mechanism, and Glutathione
 Peroxidase-like Antioxidant Activity of Stable Spirodiazaselenurane and
 Spirodiazatellurane
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              5364
_journal_page_last               5374
_journal_paper_doi               10.1021/ja908080u
_journal_volume                  132
_journal_year                    2010
_chemical_formula_sum            'C28 H18 N2 O2.5 Te'
_chemical_formula_weight         550.04
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                106.488(4)
_cell_angle_beta                 114.488(5)
_cell_angle_gamma                94.871(5)
_cell_formula_units_Z            2
_cell_length_a                   10.879(3)
_cell_length_b                   11.265(3)
_cell_length_c                   11.488(3)
_cell_measurement_temperature    293(2)
_cell_volume                     1195.0(6)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXL-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'CCDC area detector'
_diffrn_measurement_method       omega
_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  0.0384
_diffrn_reflns_av_sigmaI/netI    0.0539
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            13800
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.94
_exptl_absorpt_coefficient_mu    1.274
_exptl_absorpt_correction_T_max  0.880
_exptl_absorpt_correction_T_min  0.744
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.529
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rectangular
_exptl_crystal_F_000             544
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_refine_diff_density_max         1.524
_refine_diff_density_min         -0.545
_refine_diff_density_rms         0.114
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.099
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     365
_refine_ls_number_reflns         5392
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.101
_refine_ls_R_factor_all          0.0600
_refine_ls_R_factor_gt           0.0464
_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^)+(0.0544P)^2^+0.9808P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1104
_refine_ls_wR_factor_ref         0.1175
_reflns_number_gt                4513
_reflns_number_total             5392
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja908080u_si_005.cif
_cod_data_source_block           comp25_racemic
_cod_original_cell_volume        1195.0(5)
_cod_original_formula_sum        'C28 H18 N2 O2.50 Te'
_cod_database_code               4102289