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_4074003
_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         'C23 H25 Cl O5 Si'
_chemical_formula_sum            'C23 H25 Cl O5 Si'
_chemical_formula_weight         444.97
_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                83.47(3)
_cell_angle_beta                 85.03(3)
_cell_angle_gamma                74.21(3)
_cell_formula_units_Z            2
_cell_length_a                   8.5002(17)
_cell_length_b                   11.474(2)
_cell_length_c                   11.703(2)
_cell_measurement_reflns_used    2670
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.
_cell_measurement_theta_min      6.85
_cell_volume                     1089.4(4)
_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      173(2)
_diffrn_measured_fraction_theta_full 0.921
_diffrn_measured_fraction_theta_max 0.921
_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  0.0476
_diffrn_reflns_av_sigmaI/netI    0.0401
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            12504
_diffrn_reflns_theta_full        28.06
_diffrn_reflns_theta_max         28.06
_diffrn_reflns_theta_min         2.49
_exptl_absorpt_coefficient_mu    0.263
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.357
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             468
_exptl_crystal_size_max          .5
_exptl_crystal_size_mid          .3
_exptl_crystal_size_min          .2
_refine_diff_density_max         0.430
_refine_diff_density_min         -0.189
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     276
_refine_ls_number_reflns         4876
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0527
_refine_ls_R_factor_gt           0.0406
_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^)+(0.0539P)^2^+0.3157P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1000
_refine_ls_wR_factor_ref         0.1048
_reflns_number_gt                3999
_reflns_number_total             4876
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om700805p-file007.cif
_cod_data_source_block           nae02b
_cod_original_cell_volume        1089.3(4)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4074003