Synthesis and Structural Characterization of Magnesium Amide Complexes Containing −N[(R)(SiMe3)] Ligands
Tang, Yongjun; Zakharov, Lev N.; Rheingold, Arnold L.; Kemp, Richard A.; Organometallics 24 (2005) 836–; doi:10.1021/om049203c

data_4075710
_publ_section_title
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 Synthesis and Structural Characterization of Magnesium Amide Complexes
 Containing &#x2212;N[(R)(SiMe3)] Ligands
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_journal_issue                   5
_journal_name_full               Organometallics
_journal_page_first              836
_journal_paper_doi               10.1021/om049203c
_journal_volume                  24
_journal_year                    2005
_chemical_formula_sum            'C26 H52 Mg N6 Si2'
_chemical_formula_weight         529.23
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 99.4750(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   31.064(2)
_cell_length_b                   11.9434(9)
_cell_length_c                   17.9159(13)
_cell_measurement_reflns_used    6785
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.39
_cell_measurement_theta_min      2.22
_cell_volume                     6556.3(8)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      100(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and 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  0.0375
_diffrn_reflns_av_sigmaI/netI    0.0513
_diffrn_reflns_limit_h_max       40
_diffrn_reflns_limit_h_min       -40
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            20359
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         1.33
_exptl_absorpt_coefficient_mu    0.151
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.895
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.072
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             2320
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.436
_refine_diff_density_min         -0.248
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     524
_refine_ls_number_reflns         7477
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.009
_refine_ls_R_factor_all          0.0703
_refine_ls_R_factor_gt           0.0467
_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^)+(0.0718P)^2^+0.9443P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1150
_refine_ls_wR_factor_ref         0.1268
_reflns_number_gt                5523
_reflns_number_total             7477
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om049203csi20041216_122428.cif
_cod_data_source_block           Compound_1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
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_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               4075710