Monomeric and Dimeric Amidinate Complexes of Magnesium
Azwana R. Sadique; Mary Jane Heeg; Charles H. Winter; Inorganic Chemistry 40 (2001) 6349–6355; doi:10.1021/ic0106928

data_4320668
_publ_section_title
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 Monomeric and Dimeric Amidinate Complexes of Magnesium
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_journal_name_full               'Inorganic Chemistry'
_journal_page_first              6349
_journal_page_last               6355
_journal_paper_doi               10.1021/ic0106928
_journal_volume                  40
_journal_year                    2001
_chemical_formula_sum            'C30 H46 Mg N4'
_chemical_formula_weight         487.02
_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                 129.155(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   25.110(4)
_cell_length_b                   8.7234(12)
_cell_length_c                   18.430(3)
_cell_measurement_reflns_used    738
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      20.5
_cell_measurement_theta_min      2.5
_cell_volume                     3130.4(8)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    SHELXTL-Plus
_computing_publication_material  SHELXL-93
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.950
_diffrn_measured_fraction_theta_max 0.950
_diffrn_measurement_method       'SMART CCD'
_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  0.046
_diffrn_reflns_av_sigmaI/netI    0.1046
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            22499
_diffrn_reflns_theta_full        28.30
_diffrn_reflns_theta_max         28.30
_diffrn_reflns_theta_min         2.23
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  0.9883
_exptl_absorpt_correction_T_min  0.9752
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.033
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             1064
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.179
_refine_diff_density_min         -0.194
_refine_diff_density_rms         0.033
_refine_ls_extinction_coef       0.0019(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.832
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     234
_refine_ls_number_reflns         3700
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.832
_refine_ls_R_factor_all          0.1610
_refine_ls_R_factor_gt           0.0535
_refine_ls_shift/su_max          0.014
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0831P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1313
_refine_ls_wR_factor_ref         0.1596
_reflns_number_gt                1382
_reflns_number_total             3700
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic0106928_1.cif
_cod_data_source_block           arsa(2)
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' according to the built-in table from CIF Core dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
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_cod_database_code               4320668