Synthesis of Polysilanylmagnesium Compounds
Gaderbauer, Walter; Zirngast, Michaela; Baumgartner, Judith; Marschner, Christoph; Tilley, T. Don; Organometallics 25 (2006) 2599–2606; doi:10.1021/om060147k

data_4075230
_publ_section_title
;
 Synthesis of Polysilanylmagnesium Compounds
;
_journal_issue                   10
_journal_name_full               Organometallics
_journal_page_first              2599
_journal_page_last               2606
_journal_paper_doi               10.1021/om060147k
_journal_volume                  25
_journal_year                    2006
_chemical_formula_sum            'C22 H58 Mg O4 Si6'
_chemical_formula_weight         579.53
_space_group_IT_number           56
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ab 2ac'
_symmetry_space_group_name_H-M   'P c c n'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.069(2)
_cell_length_b                   18.334(4)
_cell_length_c                   19.739(4)
_cell_measurement_temperature    100(2)
_cell_volume                     3643.9(13)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_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      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w 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  0.0905
_diffrn_reflns_av_sigmaI/netI    0.0421
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            14977
_diffrn_reflns_theta_full        20.00
_diffrn_reflns_theta_max         20.00
_diffrn_reflns_theta_min         2.06
_exptl_absorpt_coefficient_mu    0.268
_exptl_absorpt_correction_T_max  0.9433
_exptl_absorpt_correction_T_min  0.9191
_exptl_absorpt_correction_type   SADABS
_exptl_absorpt_process_details   XPREP
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.056
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             1272
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.321
_refine_diff_density_min         -0.353
_refine_diff_density_rms         0.076
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.224
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     157
_refine_ls_number_reflns         1701
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.224
_refine_ls_R_factor_all          0.1114
_refine_ls_R_factor_gt           0.1003
_refine_ls_shift/su_max          0.044
_refine_ls_shift/su_mean         0.007
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0693P)^2^+24.8954P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2166
_refine_ls_wR_factor_ref         0.2233
_reflns_number_gt                1548
_reflns_number_total             1701
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om060147ksi20060307_052954.cif
_cod_data_source_block           6a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' 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 

The following automatic conversions were performed:

'_refine_ls_hydrogen_treatment' value 'constrained' was replaced with
the value 'constr' as specified in the replacement file
'src/cod-tools/trunk/data/replacement-values/replacement_values.lst'.

Automatic conversion script
Id: cif_fix_values 5376 2017-05-30 11:51:03Z andrius 
;
_cod_original_cell_volume        3644.1(13)
_cod_original_sg_symbol_H-M      Pccn
_cod_database_code               4075230