Low coordinate magnesium chemistry supported by a bulky ?-diketiminate ligand
Dove, Andrew P.; Gibson, Vernon C.; Hormnirun, Pimpa; Marshall, Edward L.; Segal, John A.; White, Andrew J. P.; Williams, David J.; Dalton Transactions  (2003) 3088–; doi:10.1039/b303550f

data_7013012
_publ_section_title
;
 Low coordinate magnesium chemistry supported by a bulky ?-diketiminate
 ligand
;
_journal_issue                   15
_journal_name_full               'Dalton Transactions'
_journal_page_first              3088
_journal_paper_doi               10.1039/b303550f
_journal_year                    2003
_chemical_formula_sum            'C35 H46 Mg N2'
_chemical_formula_weight         519.05
_chemical_name_systematic
; 
? 
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.8417(9)
_cell_length_b                   20.974(3)
_cell_length_c                   9.1888(4)
_cell_measurement_reflns_used    28
_cell_measurement_temperature    183(2)
_cell_measurement_theta_max      25.36
_cell_measurement_theta_min      10.58
_cell_volume                     3245.8(5)
_computing_cell_refinement       'Siemens XSCANS'
_computing_data_collection       'Siemens XSCANS'
_computing_data_reduction        'Siemens SHELXTL'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      183(2)
_diffrn_measurement_device       'Siemens P4'
_diffrn_measurement_method       '\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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0224
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       0
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            2776
_diffrn_reflns_theta_max         64.00
_diffrn_reflns_theta_min         4.22
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.633
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.062
_exptl_crystal_description       blocks
_exptl_crystal_F_000             1128
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.60
_exptl_crystal_size_min          0.47
_refine_diff_density_max         0.210
_refine_diff_density_min         -0.221
_refine_diff_density_rms         0.034
_refine_ls_extinction_coef       0.0029(3)
_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_all   1.018
_refine_ls_goodness_of_fit_obs   1.049
_refine_ls_matrix_type           full
_refine_ls_number_parameters     179
_refine_ls_number_reflns         2651
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.101
_refine_ls_restrained_S_obs      1.049
_refine_ls_R_factor_all          0.0595
_refine_ls_R_factor_obs          0.0445
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0582P)^2^+1.2396P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1284
_refine_ls_wR_factor_obs         0.1117
_reflns_number_observed          2331
_reflns_number_total             2776
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            b303550f.txt
_cod_data_source_block           Compound_6
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0582P)^2^+1.2396P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0582P)^2^+1.2396P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        3245.9(6)
_cod_original_sg_symbol_H-M      Pnma
_cod_original_formula_sum        'C35 H46 N2 Mg'
_cod_database_code               7013012