Insights into the making of a stable silylene.
Gehrhus, Barbara; Hitchcock, Peter B.; Pongtavornpinyo, Ruti; Zhang, Lihong; Dalton transactions (Cambridge, England : 2003)  (2006) 1847–1857; doi:10.1039/b514666f

data_7006839
_publ_section_title
;
 Insights into the making of a stable silylene.
;
_journal_issue                   15
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1847
_journal_page_last               1857
_journal_paper_doi               10.1039/b514666f
_journal_year                    2006
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C40 H56 N8 Si4, C16 H40 K O8, C4 H10 O2'
_chemical_formula_sum            'C60 H106 K N8 O10 Si4'
_chemical_formula_weight         1250.99
_chemical_name_common            (K(dme)4)((Si(NEt)2C6H4)4).(dme)
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      33
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.2
_audit_creation_date             2002-11-14T09:56:09-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   18.7940(4)
_cell_length_b                   18.5198(4)
_cell_length_c                   20.7545(5)
_cell_measurement_reflns_used    145333
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      22.986
_cell_measurement_theta_min      3.705
_cell_measurement_wavelength     0.71073
_cell_volume                     7223.8(3)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1275
_diffrn_reflns_av_unetI/netI     0.0774
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            45950
_diffrn_reflns_theta_full        23.02
_diffrn_reflns_theta_max         23.02
_diffrn_reflns_theta_min         3.82
_exptl_absorpt_coefficient_mu    0.195
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.15
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             2708
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.28
_refine_diff_density_min         -0.189
_refine_diff_density_rms         0.041
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.22(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     749
_refine_ls_number_reflns         9942
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0814
_refine_ls_R_factor_gt           0.0567
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0383P)^2^+4.4077P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1093
_refine_ls_wR_factor_ref         0.1191
_reflns_number_gt                7976
_reflns_number_total             9942
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b514666f.txt
_cod_data_source_block           (6a)-nov1702
_cod_original_sg_symbol_H-M      Pna2(1)
_cod_database_code               7006839