A d?but for base stabilized monoalkylsilylenes
Ramachandran Azhakar; Rajendra S. Ghadwal; Herbert W. Roesky; Hilke Wolf; Dietmar Stalke; Chem.Commun. 48 (2012) 4561–; doi:10.1039/c2cc31041d

data_7107626
_publ_section_title
;
 A d?but for base stabilized monoalkylsilylenes
;
_journal_name_full               Chem.Commun.
_journal_page_first              4561
_journal_paper_doi               10.1039/c2cc31041d
_journal_volume                  48
_journal_year                    2012
_chemical_formula_moiety         'C25 H50 N2 Si4'
_chemical_formula_sum            'C25 H50 N2 Si4'
_chemical_formula_weight         491.03
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_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                 112.04(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.7600(10)
_cell_length_b                   12.2020(10)
_cell_length_c                   17.706(2)
_cell_measurement_reflns_used    9880
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.107
_cell_measurement_theta_min      2.236
_cell_volume                     2955.8(6)
_computing_cell_refinement       'SAINT V7.68A'
_computing_data_collection       'APEX2 v2011.2'
_computing_data_reduction        'SAINT V7.68A'
_computing_molecular_graphics    'XSHELL in SHELXTL-97'
_computing_publication_material  'XSHELL in SHELXTL-97'
_computing_structure_refinement  'SHELXL in SHELXTL Version 2008/3'
_computing_structure_solution    'SHELXS in SHELXTL Version 2008/3'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Smart APEX II Ultra'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0277
_diffrn_reflns_av_sigmaI/netI    0.0156
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            50349
_diffrn_reflns_theta_full        27.11
_diffrn_reflns_theta_max         27.11
_diffrn_reflns_theta_min         1.54
_exptl_absorpt_coefficient_mu    0.216
_exptl_absorpt_correction_T_max  0.9580
_exptl_absorpt_correction_T_min  0.9580
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS-2008/2
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.103
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1080
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.354
_refine_diff_density_min         -0.200
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     295
_refine_ls_number_reflns         6530
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0325
_refine_ls_R_factor_gt           0.0278
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0349P)^2^+1.2843P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0715
_refine_ls_wR_factor_ref         0.0740
_reflns_number_gt                5862
_reflns_number_total             6530
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc31041d.txt
_cod_data_source_block           p21n_a
_cod_original_cell_volume        2955.8(5)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7107626