On the Causes of Potential Inversion in 1,2,4,5-Tetrakis(amino)benzenes
Christopher J. Adams; Rosenildo C. da Costa; Ruth Edge; Dennis H. Evans; Matthew F. Hood; Journal of Organic Chemistry 75 (2010) 1168–1178; doi:10.1021/jo902411b

data_4025234
_publ_section_title
;
 On the Causes of Potential Inversion in 1,2,4,5-Tetrakis(amino)benzenes
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              1168
_journal_page_last               1178
_journal_paper_doi               10.1021/jo902411b
_journal_volume                  75
_journal_year                    2010
_chemical_formula_sum            'C22 H34 N4 O4'
_chemical_formula_weight         418.53
_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                 92.353(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.990(3)
_cell_length_b                   6.322(2)
_cell_length_c                   20.989(8)
_cell_measurement_reflns_used    1909
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.54
_cell_measurement_theta_min      3.14
_cell_volume                     1059.3(7)
_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 0.982
_diffrn_measured_fraction_theta_max 0.982
_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  0.0365
_diffrn_reflns_av_sigmaI/netI    0.0262
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            15332
_diffrn_reflns_theta_full        27.72
_diffrn_reflns_theta_max         27.72
_diffrn_reflns_theta_min         1.94
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.9955
_exptl_absorpt_correction_T_min  0.9474
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.312
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             452
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.468
_refine_diff_density_min         -0.364
_refine_diff_density_rms         0.089
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.211
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     136
_refine_ls_number_reflns         2451
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.211
_refine_ls_R_factor_all          0.0750
_refine_ls_R_factor_gt           0.0662
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0335P)^2^+4.6785P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2007
_refine_ls_wR_factor_ref         0.2048
_reflns_number_gt                2071
_reflns_number_total             2451
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo902411b_si_008.cif
_cod_data_source_block           6
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_cell_volume        1059.2(7)
_cod_database_code               4025234