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_7215539
_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 ad
_chemical_formula_moiety         'C18 H14 N4 O S'
_chemical_formula_sum            'C18 H14 N4 O S'
_chemical_formula_weight         334.39
_chemical_melting_point          173
_chemical_name_common            2,2'-Dimethyl-3,3'-biquinazoline-4-thio-4'-one
_chemical_name_systematic
;
2,2'-Dimethyl-3,3'-biquinazoline-4-thio-4'-one
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 108.174(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.054(2)
_cell_length_b                   10.367(3)
_cell_length_c                   9.995(3)
_cell_measurement_reflns_used    13511
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     792.9(4)
_computing_data_collection       'Apex version 2.1'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Bruker Apex2 Kappa '
_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  0.0644
_diffrn_reflns_av_sigmaI/netI    0.0528
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            15758
_diffrn_reflns_theta_full        29.57
_diffrn_reflns_theta_max         29.57
_diffrn_reflns_theta_min         2.14
_exptl_absorpt_coefficient_mu    0.217
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.401
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             348
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.635
_refine_diff_density_min         -0.481
_refine_diff_density_rms         0.073
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     219
_refine_ls_number_reflns         4295
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0580
_refine_ls_R_factor_gt           0.0505
_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          0.1373
_refine_ls_wR_factor_ref         0.1437
_reflns_number_gt                3800
_reflns_number_total             4295
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             7200392
_cod_data_source_file            b814424a.txt
_cod_data_source_block           C18H14N4OS
_cod_depositor_comments
;
 Updated bibliographic information.

 Antanas Vaitkus,
 2019-09-18

 Marked entry as a duplicate of entry 7200392.

 Antanas Vaitkus,
 2019-09-18
;
_cod_original_sg_symbol_H-M      P21
_cod_database_code               7215539