Tetrakis(3,5-dimethylpyridine)dihydridosilicon dibromide bis(acetonitrile) solvate and 3,5-dimethylpyridinium bromide
Bolte, Michael; Hensen, Karl; Faber, Alexander; Acta Crystallographica Section C 56 (2000) e524–e525; doi:10.1107/S0108270100013470

data_2011550
_publ_section_title
;
 Tetrakis(3,5-dimethylpyridine)dihydridosilicon dibromide
 bis(acetonitrile) solvate and 3,5-dimethylpyridinium bromide
;
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              e524
_journal_page_last               e525
_journal_paper_doi               10.1107/S0108270100013470
_journal_volume                  56
_journal_year                    2000
_chemical_formula_iupac          'C28 H38 N4 Si 2+, 2Br 1-, 2C2 H3 N1'
_chemical_formula_moiety         'C28 H38 N4 Si 2+, 2Br 1-, 2C2 H3 N1'
_chemical_formula_sum            'C32 H44 Br2 N6 Si'
_chemical_formula_weight         700.64
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.490(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.636(2)
_cell_length_b                   11.237(2)
_cell_length_c                   16.242(3)
_cell_measurement_reflns_used    7291
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      1
_cell_volume                     1753.3(6)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Siemens, 1995)'
_computing_data_reduction        'SAINT (Siemens, 1995)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Siemens CCD three-circle'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     .71073
_diffrn_reflns_av_R_equivalents  .056
_diffrn_reflns_av_sigmaI/netI    .0329
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            32839
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         2.12
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  960
_diffrn_standards_number         386
_exptl_absorpt_coefficient_mu    2.375
_exptl_absorpt_correction_T_max  .271
_exptl_absorpt_correction_T_min  .185
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.327
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             724
_exptl_crystal_size_max          .75
_exptl_crystal_size_mid          .70
_exptl_crystal_size_min          .55
_refine_diff_density_max         .778
_refine_diff_density_min         -.770
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.109
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     196
_refine_ls_number_reflns         4345
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.109
_refine_ls_R_factor_all          .076
_refine_ls_R_factor_gt           .054
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         <0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0451P)^2^+2.4478P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         .121
_reflns_number_gt                3390
_reflns_number_total             4345
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            qa0413.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 'Empirical'
changed to 'empirical' 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 21/c'
_cod_database_code               2011550