Alkoxide binding in inverse crown chemistry: rational synthesis of a series of composite alkali metal–magnesium–alkoxide–diisopropylamides
Drewette, Katy J.; Henderson, Kenneth W.; Kennedy, Alan R.; Mulvey, Robert E.; O’Hara, Charles T.; Rowlings, René B.; Chemical Communications  (2002) 1176–; doi:10.1039/b202549c

data_7114369
_publ_section_title
;
 Alkoxide binding in inverse crown chemistry: rational synthesis of a
 series of composite alkali metal--magnesium--alkoxide--diisopropylamides
;
_journal_issue                   11
_journal_name_full               'Chemical Communications'
_journal_page_first              1176
_journal_paper_doi               10.1039/b202549c
_journal_year                    2002
_chemical_formula_sum            'C40 H90 Mg2 N4 Na2 O2'
_chemical_formula_weight         753.76
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 98.680(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.7260(4)
_cell_length_b                   13.8181(4)
_cell_length_c                   16.5769(5)
_cell_measurement_reflns_used    all
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      25.00
_cell_measurement_theta_min      2.42
_cell_volume                     2428.77(14)
_computing_cell_refinement       'Denzo and Collect'
_computing_data_collection       'Denzo and Collect'
_computing_data_reduction        'Denzo and Denzox'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.942
_diffrn_measured_fraction_theta_max 0.942
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_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  0.150
_diffrn_reflns_av_sigmaI/netI    0.0863
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            18646
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.42
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.101
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.031
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'cut prism'
_exptl_crystal_F_000             840
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.418
_refine_diff_density_min         -0.235
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.060
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     260
_refine_ls_number_reflns         4218
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.060
_refine_ls_R_factor_all          0.0724
_refine_ls_R_factor_gt           0.0643
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0780P)^2^+1.1041P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1719
_refine_ls_wR_factor_ref         0.1814
_reflns_number_gt                3614
_reflns_number_total             4218
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b202549c.txt
_cod_data_source_block           import
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0780P)^2^+1.1041P] 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^)+(0.0780P)^2^+1.1041P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7114369