Synthesis, crystal structures and reactions of sila- and germa-β-diketiminates
Farwell, James D.; Fernandes, Manuel A.; Hitchcock, Peter B.; Lappert, Michael F.; Layh, Marcus; Omondi, Bernard; Dalton Transactions  (2003) 1719–; doi:10.1039/b300817g

data_7012747
_publ_section_title
;
 Synthesis, crystal structures and reactions of sila- and
 germa-\b-diketiminates
;
_journal_issue                   9
_journal_name_full               'Dalton Transactions'
_journal_page_first              1719
_journal_paper_doi               10.1039/b300817g
_journal_year                    2003
_chemical_formula_moiety         'C27 H45 Br N2 Si4'
_chemical_formula_sum            'C27 H45 Br N2 Si4'
_chemical_formula_weight         589.92
_chemical_name_systematic
;
Bromo (trimethylsilyl)-bis((trimethylsilyl)imino-(2,6-
dimethylphenyl)methyl)silane
;
_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                73.829(3)
_cell_angle_beta                 71.999(2)
_cell_angle_gamma                86.555(3)
_cell_formula_units_Z            2
_cell_length_a                   10.5310(15)
_cell_length_b                   11.3263(16)
_cell_length_c                   15.066(2)
_cell_measurement_temperature    173(2)
_cell_volume                     1640.8(4)
_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    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'CCD area deector'
_diffrn_measurement_method       'phi and 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  0.0465
_diffrn_reflns_av_sigmaI/netI    0.0414
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            10609
_diffrn_reflns_theta_full        26.99
_diffrn_reflns_theta_max         26.99
_diffrn_reflns_theta_min         1.48
_exptl_absorpt_coefficient_mu    1.416
_exptl_absorpt_correction_T_max  0.8484
_exptl_absorpt_correction_T_min  0.5207
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'Sheldrick, G. M. (1996). SADABS. University of Gottingen, Germany.'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.194
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             624
_exptl_crystal_preparation       'grown from hexane at -20 C'
_exptl_crystal_size_max          0.53
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.12
_refine_diff_density_max         1.436
_refine_diff_density_min         -1.415
_refine_diff_density_rms         0.196
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.078
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     326
_refine_ls_number_reflns         7063
_refine_ls_number_restraints     69
_refine_ls_restrained_S_all      1.147
_refine_ls_R_factor_all          0.0833
_refine_ls_R_factor_gt           0.0750
_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^)+(0.1419P)^2^+0.7819P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1933
_refine_ls_wR_factor_ref         0.2008
_reflns_number_gt                5975
_reflns_number_total             7063
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b300817g.txt
_cod_data_source_block           hgbrke_s
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-scan' changed
to 'multi-scan' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7012747