Synthesis of Bromo-, Boryl-, and Stannyl-Functionalized 1,2-Bis(trimethylsilyl)benzenes via Diels-Alder or C-H Activation Reactions
Christian Reus; Nai-Wei Liu; Michael Bolte; Hans-Wolfram Lerner; Matthias Wagner; Journal of Organic Chemistry 77 (2012) 3518–3523; doi:10.1021/jo3002936

data_4027139
_publ_section_title
;
 Synthesis of Bromo-, Boryl-, and Stannyl-Functionalized
 1,2-Bis(trimethylsilyl)benzenes via Diels-Alder or C-H Activation
 Reactions
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              3518
_journal_page_last               3523
_journal_paper_doi               10.1021/jo3002936
_journal_volume                  77
_journal_year                    2012
_chemical_formula_moiety         'C24 H42 Si4'
_chemical_formula_sum            'C24 H42 Si4'
_chemical_formula_weight         442.94
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 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                 116.015(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   29.312(3)
_cell_length_b                   7.4728(14)
_cell_length_c                   28.123(3)
_cell_measurement_reflns_used    5479
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.3
_cell_measurement_theta_min      2.3
_cell_volume                     5536.0(14)
_computing_cell_refinement       'X-Area (Stoe & Cie, 2001)'
_computing_data_collection       'X-Area (Stoe & Cie, 2001)'
_computing_data_reduction        'X-Area (Stoe & Cie, 2001)'
_computing_molecular_graphics    'XP in SHELXTL-Plus (Sheldrick, 1991)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008) '
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008) '
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'STOE IPDS II two-circle-diffractometer'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'Genix 3D multilayer optics'
_diffrn_radiation_source         'Genix 3D I\mS microfocus x-ray source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1707
_diffrn_reflns_av_sigmaI/netI    0.1981
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -34
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            13360
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.23
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.223
_exptl_absorpt_correction_T_max  0.9933
_exptl_absorpt_correction_T_min  0.9547
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'MULABS (Spek, 2003; Blessing, 1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.063
_exptl_crystal_description       needle
_exptl_crystal_F_000             1936
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.502
_refine_diff_density_min         -0.506
_refine_diff_density_rms         0.099
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.3(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.985
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     505
_refine_ls_number_reflns         8523
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.985
_refine_ls_R_factor_all          0.1726
_refine_ls_R_factor_gt           0.1204
_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^)+(0.1443P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2865
_refine_ls_wR_factor_ref         0.3277
_reflns_number_gt                4000
_reflns_number_total             8523
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo3002936_si_002_5.cif
_cod_data_source_block           wa1371
_cod_original_cell_volume        5536.0(13)
_cod_database_code               4027139