Twice silicon-induced C–H activation and tautomerisation of a β-diketiminato ligand and formation of new types of N-heterocyclic silanes
Xiong, Yun; Yao, Shenglai; Driess, Matthias; Dalton Transactions  (2009) 421–423; doi:10.1039/b820285k

data_7000306
_publ_section_title
;
 Twice silicon-induced C--H activation and tautomerisation of a
 \b-diketiminato ligand and formation of new types of N-heterocyclic
 silanes
;
_journal_issue                   3
_journal_name_full               'Dalton Transactions'
_journal_page_first              421
_journal_page_last               423
_journal_paper_doi               10.1039/b820285k
_journal_year                    2009
_chemical_formula_sum            'C21 H24 Br2 N2 Si'
_chemical_formula_weight         492.33
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.29.10 (release 13-04-2006 CrysAlis171 .NET)
(compiled Apr 13 2006,12:24:59)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 104.903(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.9450(4)
_cell_length_b                   8.2720(2)
_cell_length_c                   17.7852(4)
_cell_measurement_reflns_used    5635
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.7107
_cell_measurement_theta_min      2.9217
_cell_volume                     2124.74(10)
_computing_cell_refinement
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.29.10 (release 13-04-2006 CrysAlis171 .NET)
(compiled Apr 13 2006,12:24:59)
;
_computing_data_collection
;
CrysAlis CCD, Oxford Diffraction Ltd.,
Version 1.171.29.10 (release 13-04-2006 CrysAlis171 .NET)
(compiled Apr 13 2006,12:24:59)
;
_computing_data_reduction
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.29.10 (release 13-04-2006 CrysAlis171 .NET)
(compiled Apr 13 2006,12:24:59)
;
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Oxford Diffraction Xcalibur S Sapphire'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0370
_diffrn_reflns_av_sigmaI/netI    0.0452
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            13787
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.93
_exptl_absorpt_coefficient_mu    3.879
_exptl_absorpt_correction_T_max  0.750
_exptl_absorpt_correction_T_min  0.358
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.29.10 (release 13-04-2006 CrysAlis171 .NET)
(compiled Apr 13 2006,12:24:59)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.539
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             992
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.438
_refine_diff_density_min         -0.400
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.990
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     240
_refine_ls_number_reflns         3731
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.990
_refine_ls_R_factor_all          0.0565
_refine_ls_R_factor_gt           0.0305
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0351P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0630
_refine_ls_wR_factor_ref         0.0708
_reflns_number_gt                2656
_reflns_number_total             3731
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b820285k.txt
_cod_data_source_block           CCDC705079
_cod_original_cell_volume        2124.73(9)
_cod_original_sg_symbol_H-M      P21/a
_cod_database_code               7000306