Potential Protecting Group Strategy for Disila Analogues of Vinyllithiums: Synthesis and Reactivity of a 2,4,6-Trimethoxyphenyl-Substituted Disilene
Meltzer, Antje; Majumdar, Moumita; White, Andrew J. P.; Huch, Volker; Scheschkewitz, David; Organometallics 32 (2013) 6844–; doi:10.1021/om400545w

data_4081796
_publ_section_title
;
 Potential Protecting Group Strategy for Disila Analogues of
 Vinyllithiums: Synthesis and Reactivity of a
 2,4,6-Trimethoxyphenyl-Substituted Disilene
;
_journal_issue                   22
_journal_name_full               Organometallics
_journal_page_first              6844
_journal_paper_doi               10.1021/om400545w
_journal_volume                  32
_journal_year                    2013
_chemical_formula_sum            'C54 H82 O4 Si2'
_chemical_formula_weight         851.38
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_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_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                   18.8601(9)
_cell_length_b                   14.1435(7)
_cell_length_c                   19.3532(10)
_cell_measurement_reflns_used    9794
_cell_measurement_temperature    132(2)
_cell_measurement_theta_max      26.19
_cell_measurement_theta_min      2.40
_cell_volume                     5162.4(4)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      132(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \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  0.0654
_diffrn_reflns_av_sigmaI/netI    0.0371
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            89725
_diffrn_reflns_theta_full        27.88
_diffrn_reflns_theta_max         27.88
_diffrn_reflns_theta_min         1.78
_exptl_absorpt_coefficient_mu    0.110
_exptl_absorpt_correction_T_max  0.9633
_exptl_absorpt_correction_T_min  0.9246
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.095
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1864
_exptl_crystal_size_max          0.72
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.34
_refine_diff_density_max         0.612
_refine_diff_density_min         -0.255
_refine_diff_density_rms         0.044
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.04(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     570
_refine_ls_number_reflns         12322
_refine_ls_number_restraints     159
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.0544
_refine_ls_R_factor_gt           0.0439
_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^)+(0.0538P)^2^+1.7193P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1051
_refine_ls_wR_factor_ref         0.1114
_reflns_number_gt                10736
_reflns_number_total             12322
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om400545w_si_010.cif
_cod_data_source_block           4
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      Pna2(1)
_cod_database_code               4081796