Bent phenyl groups in lithiosilanes–crystal structures and interpretation of this unanticipated feature.
Strohmann, Carsten; Däschlein, Christian; Chemical communications (Cambridge, England)  (2008) 2791–2793; doi:10.1039/b802211a

data_7103175
_publ_section_title
;
 Bent phenyl groups in lithiosilanes--crystal structures and
 interpretation of this unanticipated feature.
;
_journal_issue                   24
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              2791
_journal_page_last               2793
_journal_paper_doi               10.1039/b802211a
_journal_year                    2008
_chemical_formula_sum            'C23 H48 Li N5 Si'
_chemical_formula_weight         429.69
_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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2007-11-05T21:02:38-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 99.07(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.714(4)
_cell_length_b                   9.9895(12)
_cell_length_c                   19.355(4)
_cell_measurement_temperature    193(2)
_cell_volume                     2809.4(10)
_computing_cell_refinement       'Cell in IPDS (Stoe & Cie, 1999)'
_computing_data_collection       'Expose in IPDS (Stoe & Cie, 1999)'
_computing_data_reduction        'Integrate in IPDS (Stoe & Cie, 1999)'
_computing_molecular_graphics    'Schakal99 (Keller, 1999)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Stoe IPDS'
_diffrn_measurement_method       'phi scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0471
_diffrn_reflns_av_unetI/netI     0.0295
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            28705
_diffrn_reflns_theta_full        27
_diffrn_reflns_theta_max         27
_diffrn_reflns_theta_min         2.3
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.1
_exptl_absorpt_correction_T_max  0.8300
_exptl_absorpt_correction_T_min  0.4746
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'FACEIT in IPDS (Stoe & Cie, 1999)'
_exptl_crystal_density_diffrn    1.016
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             952
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.245
_refine_diff_density_min         -0.287
_refine_diff_density_rms         0.035
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.009
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     280
_refine_ls_number_reflns         6091
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.009
_refine_ls_R_factor_all          0.0539
_refine_ls_R_factor_gt           0.0422
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0794P)^2^+0.2150P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1147
_refine_ls_wR_factor_ref         0.122
_reflns_number_gt                4745
_reflns_number_total             6091
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b802211a.txt
_cod_data_source_block           vi290906
_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 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7103175