Synthesis, Structural Elucidation, and Diffusion-Ordered NMR Studies of Homoleptic Alkyllithium Magnesiates: Donor-Controlled Structural Variations in Mixed-Metal Chemistry
Baillie, Sharon E.; Clegg, William; Garc\?ía-Álvarez, Pablo; Hevia, Eva; Kennedy, Alan R.; Klett, Jan; Russo, Luca; Organometallics 31 (2012) 5131–; doi:10.1021/om300477m

data_4078867
_publ_section_title
;
 Synthesis, Structural Elucidation, and Diffusion-Ordered NMR Studies of
 Homoleptic Alkyllithium Magnesiates: Donor-Controlled Structural
 Variations in Mixed-Metal Chemistry
;
_journal_issue                   14
_journal_name_full               Organometallics
_journal_page_first              5131
_journal_paper_doi               10.1021/om300477m
_journal_volume                  31
_journal_year                    2012
_chemical_formula_moiety         'C20 H49 Li Mg O4 Si3'
_chemical_formula_sum            'C20 H49 Li Mg O4 Si3'
_chemical_formula_weight         469.11
_chemical_name_systematic
;
 ?
;
_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   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                104.171(4)
_cell_angle_beta                 96.327(4)
_cell_angle_gamma                111.437(5)
_cell_formula_units_Z            2
_cell_length_a                   9.6476(5)
_cell_length_b                   11.0862(6)
_cell_length_c                   15.5535(6)
_cell_measurement_reflns_used    6455
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.50
_cell_measurement_theta_min      2.95
_cell_volume                     1464.12(14)
_computing_cell_refinement
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.41 (release 06-05-2009 CrysAlis171 .NET)
(compiled May  6 2009,17:20:42)
;
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.41 (release 06-05-2009 CrysAlis171 .NET)
(compiled May  6 2009,17:20:42)
;
_computing_data_reduction
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.41 (release 06-05-2009 CrysAlis171 .NET)
(compiled May  6 2009,17:20:42)
;
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 10.3968
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.783
_diffrn_measurement_device_type
'Oxford Diffraction Gemini A Ultra diffractometer'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  none
_diffrn_radiation_source         'sealed tube with Enhance optics'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0181
_diffrn_reflns_av_sigmaI/netI    0.0289
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            9680
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.58
_diffrn_reflns_theta_min         2.96
_exptl_absorpt_coefficient_mu    0.203
_exptl_absorpt_correction_T_max  0.953
_exptl_absorpt_correction_T_min  0.916
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.41 (release 06-05-2009 CrysAlis171 .NET)
(compiled May  6 2009,17:20:42)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.064
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             516
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.418
_refine_diff_density_min         -0.336
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.079
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     323
_refine_ls_number_reflns         5839
_refine_ls_number_restraints     25
_refine_ls_restrained_S_all      1.125
_refine_ls_R_factor_all          0.0432
_refine_ls_R_factor_gt           0.0340
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0517P)^2^+0.1869P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0910
_refine_ls_wR_factor_ref         0.0936
_reflns_number_gt                4761
_reflns_number_total             5839
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            om300477m_si_001.cif
_cod_data_source_block           rem535_compound_3
_cod_original_cell_volume        1464.12(12)
_cod_database_code               4078867