Segregation into Chiral Enantiomeric Conformations of an Achiral Molecule by Concomitant Polymorphism
Rajbongshi, Basanta Kumar; Nair, Nisanth N.; Nethaji, M.; Ramanathan, Gurunath; Crystal Growth & Design 12 (2012) 1823–; doi:10.1021/cg201313g

data_4505882
_publ_section_title
;
 Segregation into Chiral Enantiomeric Conformations of an Achiral Molecule
 by Concomitant Polymorphism
;
_journal_issue                   4
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1823
_journal_paper_doi               10.1021/cg201313g
_journal_volume                  12
_journal_year                    2012
_chemical_formula_moiety         'C27 H22 N2 O2'
_chemical_formula_sum            'C27 H22 N2 O2'
_chemical_formula_weight         406.47
_space_group_IT_number           76
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P 4w'
_symmetry_space_group_name_H-M   'P 41'
_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                   19.9715(17)
_cell_length_b                   19.9715(17)
_cell_length_c                   5.4372(6)
_cell_measurement_reflns_used    586
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.00
_cell_measurement_theta_min      2.00
_cell_volume                     2168.7(4)
_computing_cell_refinement       'BRUKER SMART APEX CCD'
_computing_data_collection       'BRUKER SMART APEX CCD'
_computing_data_reduction        'BRUKER SMART SAINT'
_computing_molecular_graphics    ORTEPIII
_computing_publication_material  'WINGX V1.80.01'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    SHELXS-97
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 0.3
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'BRUKER SMART APEC DD'
_diffrn_measurement_method       OMEGA
_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  0.0423
_diffrn_reflns_av_sigmaI/netI    0.0556
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            14181
_diffrn_reflns_theta_full        28.33
_diffrn_reflns_theta_max         28.33
_diffrn_reflns_theta_min         2.28
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  0.9906
_exptl_absorpt_correction_T_min  0.9790
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            RED
_exptl_crystal_density_diffrn    1.245
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       RECTANGULAR
_exptl_crystal_F_000             856
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.283
_refine_diff_density_min         -0.233
_refine_diff_density_rms         0.050
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(19)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.100
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     281
_refine_ls_number_reflns         5199
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.100
_refine_ls_R_factor_all          0.0874
_refine_ls_R_factor_gt           0.0580
_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^)+(0.0466P)^2^+1.2165P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1202
_refine_ls_wR_factor_ref         0.1537
_reflns_number_gt                3911
_reflns_number_total             5199
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            cg201313g_si_004.cif
_cod_data_source_block           29juna
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'TETRAGONAL' changed to 'tetragonal'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'EMPIRICAL'
changed to 'empirical' 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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_Hall     P4w
_cod_original_sg_symbol_H-M      P41
_cod_database_code               4505882