Classical versus Bridged Allyl Ligands in Magnesium Complexes: The Role of Solvent
Stephen C. Chmely; Christin N. Carlson; Timothy P. Hanusa; Arnold L. Rheingold; Journal of the American Chemical Society 131 (2009) 6344–6345; doi:10.1021/ja900998t

data_4104347
_publ_contact_author_address
;Department of Chemistry
Vanderbilt University
Nashville, TN 37235
USA
;
_publ_contact_author_email       t.hanusa@vanderbilt.edu
_publ_contact_author_fax         615-343-1234
_publ_contact_author_name        'Timothy P. Hanusa'
_publ_contact_author_phone       615-322-4667
_publ_section_title
;
 Classical versus Bridged Allyl Ligands in Magnesium Complexes: The Role
 of Solvent
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              6344
_journal_page_last               6345
_journal_paper_doi               10.1021/ja900998t
_journal_volume                  131
_journal_year                    2009
_chemical_formula_sum            'C18 H42 Mg Si4'
_chemical_formula_weight         395.19
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 100.1650(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.7597(2)
_cell_length_b                   12.9099(2)
_cell_length_c                   19.7051(3)
_cell_measurement_reflns_used    9891
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      68.15
_cell_measurement_theta_min      4.11
_cell_volume                     2694.21(8)
_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, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 0.967
_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           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0226
_diffrn_reflns_av_sigmaI/netI    0.0324
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            15128
_diffrn_reflns_theta_full        58.00
_diffrn_reflns_theta_max         68.17
_diffrn_reflns_theta_min         2.28
_exptl_absorpt_coefficient_mu    2.247
_exptl_absorpt_correction_T_max  0.888
_exptl_absorpt_correction_T_min  0.723
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, R. Blessing, 1995'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    0.974
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             872
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.329
_refine_diff_density_min         -0.156
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.039(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.997
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     487
_refine_ls_number_reflns         6694
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.997
_refine_ls_R_factor_all          0.0292
_refine_ls_R_factor_gt           0.0273
_refine_ls_shift/su_max          0.224
_refine_ls_shift/su_mean         0.009
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0480P)^2^+0.1200P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0695
_refine_ls_wR_factor_ref         0.0711
_reflns_number_gt                6410
_reflns_number_total             6694
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja900998t_si_003.cif
_cod_data_source_block           vand60
_cod_database_code               4104347