The first asymmetric organolithium tetramers with simple ether donor bases
Tatic, Tanja; Meindl, Kathrin; Henn, Julian; Pandey, Sushil Kumar; Stalke, Dietmar; Chemical Communications 46 (2010) 4562–4564; doi:10.1039/c002504f

data_7111617
_publ_section_title
;
 The first asymmetric organolithium tetramers with simple ether donor
 bases
;
_journal_issue                   25
_journal_name_full               'Chemical Communications'
_journal_page_first              4562
_journal_page_last               4564
_journal_paper_doi               10.1039/c002504f
_journal_volume                  46
_journal_year                    2010
_chemical_formula_sum            'C16 H42 Li2 O4 Si2'
_chemical_formula_weight         368.56
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 92.8900(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            6
_cell_length_a                   10.4667(8)
_cell_length_b                   18.3838(13)
_cell_length_c                   19.2670(14)
_cell_measurement_reflns_used    9944
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.048
_cell_measurement_theta_min      2.437
_cell_volume                     3702.6(5)
_computing_cell_refinement       'SAINT V7.34A'
_computing_data_collection       'APEX2 v2.1-0'
_computing_data_reduction        'SAINT V7.34A'
_computing_molecular_graphics    'XP in SHELXTL ver. 6.10'
_computing_publication_material  'XP in SHELXTL ver. 6.10'
_computing_structure_refinement  'SHELXL in SHELXTL ver. 6.10'
_computing_structure_solution    'SHELXS in SHELXTL ver. 6.10'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker Smart Apex II with D8-Goniometer'
_diffrn_measurement_method       'omega 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  0.0239
_diffrn_reflns_av_sigmaI/netI    0.0116
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            65904
_diffrn_reflns_theta_full        26.04
_diffrn_reflns_theta_max         26.04
_diffrn_reflns_theta_min         2.24
_exptl_absorpt_coefficient_mu    0.156
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.86
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS-2004/1
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    0.992
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1224
_exptl_crystal_size_max          0.8
_exptl_crystal_size_mid          0.5
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.344
_refine_diff_density_min         -0.169
_refine_diff_density_rms         0.035
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     358
_refine_ls_number_reflns         7276
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0324
_refine_ls_R_factor_gt           0.0287
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0415P)^2^+0.9453P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0755
_refine_ls_wR_factor_ref         0.0778
_reflns_number_gt                6605
_reflns_number_total             7276
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            C002504Fsup1.cif
_cod_data_source_block           dme
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7111617