[PhSiO1.5]8 promotes self-bromination to produce [o-BrPhSiO1.5]8: further bromination gives crystalline [2,5-Br2PhSiO1.5]8 with a density of 2.32 g cm−3 and a calculated refractive index of 1.7 or the tetraicosa bromo compound [Br3PhSiO1.5]8
Roll, Mark F.; Mathur, Priyanka; Takahashi, Kunio; Kampf, Jeffrey W.; Laine, R. M.; Journal of Materials Chemistry 21 (2011) 11167–; doi:10.1039/c1jm11536g

data_7206354
_publ_section_title
;
 [PhSiO1.5]8 promotes self-bromination to produce [o-BrPhSiO1.5]8:
 further bromination gives crystalline [2,5-Br2PhSiO1.5]8 with a
 density of 2.32 g cm&#x2212;3 and a calculated refractive index of 1.7
 or the tetraicosa bromo compound [Br3PhSiO1.5]8
;
_journal_issue                   30
_journal_name_full               'Journal of Materials Chemistry'
_journal_page_first              11167
_journal_paper_doi               10.1039/c1jm11536g
_journal_volume                  21
_journal_year                    2011
_chemical_formula_moiety         'C48 H16 Br24 O12 Si8, 5(C6 H4 Cl2)'
_chemical_formula_sum            'C78 H36 Br24 Cl5 O12 Si8'
_chemical_formula_weight         3484.88
_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                65.3990(10)
_cell_angle_beta                 74.6160(10)
_cell_angle_gamma                82.1720(10)
_cell_formula_units_Z            2
_cell_length_a                   15.5726(10)
_cell_length_b                   20.4685(13)
_cell_length_c                   20.6449(13)
_cell_measurement_reflns_used    9953
_cell_measurement_temperature    85(2)
_cell_measurement_theta_max      21.34
_cell_measurement_theta_min      2.19
_cell_volume                     5766.3(6)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      85(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_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  0.0540
_diffrn_reflns_av_sigmaI/netI    0.0294
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            136685
_diffrn_reflns_theta_full        21.40
_diffrn_reflns_theta_max         21.40
_diffrn_reflns_theta_min         1.09
_exptl_absorpt_coefficient_mu    8.573
_exptl_absorpt_correction_T_max  0.3799
_exptl_absorpt_correction_T_min  0.2789
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Blessing, R. Acta Cryst. (1995) A51 33-38.
Sheldrick, G. SADABS (Version 2008/1) Bruker AXS area
detector absorption and other corrections, University of
Gottingen, Germany 2008.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.007
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             3274
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.14
_refine_diff_density_max         2.258
_refine_diff_density_min         -1.409
_refine_diff_density_rms         0.151
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.089
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     967
_refine_ls_number_reflns         13049
_refine_ls_number_restraints     296
_refine_ls_restrained_S_all      1.092
_refine_ls_R_factor_all          0.0757
_refine_ls_R_factor_gt           0.0629
_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^)+(0.1299P)^2^+1.7082P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1935
_refine_ls_wR_factor_ref         0.2024
_reflns_number_gt                10155
_reflns_number_total             13049
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1jm11536g.txt
_cod_data_source_block           br3ops
_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.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7206354