Stereostructural behaviour of N‒N atropisomers: Two conglomerate crystallisations and a crystallisation-induced deracemisation
Arthur, Richard J.; Coogan, Michael P.; Casadesus, Meritxell; Haigh, Robert; Headspith, D. A.; Francesconi, M. Grazia; Laye, Rebecca H.; CrystEngComm 11 (2009) 610–619; doi:10.1039/b814424a

data_7215538
_publ_section_title
;
 Stereostructural behaviour of N--N atropisomers: Two conglomerate
 crystallisations and a crystallisation-induced deracemisation
;
_journal_coden_ASTM              CRECF4
_journal_issue                   4
_journal_name_full               CrystEngComm
_journal_page_first              610
_journal_page_last               619
_journal_paper_doi               10.1039/b814424a
_journal_volume                  11
_journal_year                    2009
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C14 H14 N4 O2'
_chemical_formula_sum            'C14 H14 N4 O2'
_chemical_formula_weight         270.29
_chemical_melting_point          212
_chemical_name_common            1,2-bis-(2-aminobenzoyl)hydrazine
_chemical_name_systematic
;
1,2-bis-(2-aminobenzoyl)hydrazine
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.1158(3)
_cell_length_b                   9.9478(4)
_cell_length_c                   13.7725(5)
_cell_measurement_reflns_used    11218
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     1248.92(8)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       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  0.1509
_diffrn_reflns_av_sigmaI/netI    0.0900
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            11134
_diffrn_reflns_theta_full        27.44
_diffrn_reflns_theta_max         27.44
_diffrn_reflns_theta_min         2.96
_exptl_absorpt_coefficient_mu    0.100
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.438
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             568
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.287
_refine_diff_density_min         -0.275
_refine_diff_density_rms         0.067
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(10)
_refine_ls_extinction_coef       0.034(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   0.936
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     206
_refine_ls_number_reflns         1643
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.936
_refine_ls_R_factor_all          0.1064
_refine_ls_R_factor_gt           0.0564
_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^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1266
_refine_ls_wR_factor_ref         0.1550
_reflns_number_gt                1094
_reflns_number_total             1643
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             7200391
_cod_data_source_file            b814424a.txt
_cod_data_source_block           C14H14N4O2
_cod_depositor_comments
;
 Updated bibliographic information.

 Antanas Vaitkus,
 2019-09-18

 Marked entry as a duplicate of entry 7200391.

 Antanas Vaitkus,
 2019-09-18
;
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               7215538