The 2,4,6-Trimethoxyphenyl Unit as a Unique Protecting Group for Silicon in Synthesis and the Silylation Potential of (2,4,6-Trimethoxyphenyl)silanes
Popp, Friedrich; Nätscher, Jennifer B.; Daiss, Jürgen O.; Burschka, Christian; Tacke, Reinhold; Organometallics 26 (2007) 6014–; doi:10.1021/om700805p

data_4073999
_publ_section_title
;
 The 2,4,6-Trimethoxyphenyl Unit as a Unique Protecting Group for Silicon
 in Synthesis and the Silylation Potential of
 (2,4,6-Trimethoxyphenyl)silanes
;
_journal_issue                   24
_journal_name_full               Organometallics
_journal_page_first              6014
_journal_paper_doi               10.1021/om700805p
_journal_volume                  26
_journal_year                    2007
_chemical_formula_moiety         'C18 H22 O3 Si'
_chemical_formula_sum            'C18 H22 O3 Si'
_chemical_formula_weight         314.45
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                77.363(12)
_cell_angle_beta                 72.171(12)
_cell_angle_gamma                80.161(13)
_cell_formula_units_Z            2
_cell_length_a                   8.5471(10)
_cell_length_b                   9.8544(11)
_cell_length_c                   11.1205(12)
_cell_measurement_reflns_used    4067
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      21.2
_cell_measurement_theta_min      6.9
_cell_volume                     864.60(18)
_computing_cell_refinement       Stoe-IPDS
_computing_data_collection       Stoe-IPDS
_computing_data_reduction        Stoe-IPDS
_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      193(2)
_diffrn_measured_fraction_theta_full 0.923
_diffrn_measured_fraction_theta_max 0.923
_diffrn_measurement_device_type  Stoe-IPDS
_diffrn_measurement_method       Stoe-IPDS
_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  0.0258
_diffrn_reflns_av_sigmaI/netI    0.0228
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            9587
_diffrn_reflns_theta_full        26.90
_diffrn_reflns_theta_max         26.90
_diffrn_reflns_theta_min         2.52
_exptl_absorpt_coefficient_mu    0.145
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.208
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             336
_exptl_crystal_size_max          .5
_exptl_crystal_size_mid          .4
_exptl_crystal_size_min          .3
_refine_diff_density_max         0.251
_refine_diff_density_min         -0.186
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.068
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     203
_refine_ls_number_reflns         3437
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.0428
_refine_ls_R_factor_gt           0.0357
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0510P)^2^+0.2243P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0960
_refine_ls_wR_factor_ref         0.0994
_reflns_number_gt                2928
_reflns_number_total             3437
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om700805p-file003.cif
_cod_data_source_block           pop01b
_cod_original_cell_volume        864.60(17)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4073999