Tröger's base quasiracemates and crystal packing tendencies
Cross, Jacob T.; Rossi, Nicholas A.; Serafin, Mateusz; Wheeler, Kraig A.; CrystEngComm 16 (2014) 7251–; doi:10.1039/C4CE00323C

data_7217456
_publ_section_title
;
 Tr\"oger's base quasiracemates and crystal packing tendencies
;
_journal_issue                   31
_journal_name_full               CrystEngComm
_journal_page_first              7251
_journal_paper_doi               10.1039/C4CE00323C
_journal_volume                  16
_journal_year                    2014
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C15 H13 Br2 N2, Cl, C H Cl3'
_chemical_formula_sum            'C16 H14 Br2 Cl4 N2'
_chemical_formula_weight         535.91
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.4113(1)
_cell_length_b                   9.0495(1)
_cell_length_c                   25.1456(3)
_cell_measurement_reflns_used    9912
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      71.588
_cell_measurement_theta_min      3.515
_cell_volume                     1914.03(4)
_computing_cell_refinement       APEX2
_computing_data_collection       APEX2
_computing_data_reduction
;
SAINT (Bruker, 2010) and XPREP (Bruker, 2010)
;
_computing_molecular_graphics    'XSEED (Barbour, 2001)'
_computing_publication_material  'XSEED (Barbour, 2001)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXL-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEXII CCD'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0334
_diffrn_reflns_av_unetI/netI     0.0232
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            16667
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         68.214
_diffrn_reflns_theta_min         3.515
_exptl_absorpt_coefficient_mu    10.523
_exptl_absorpt_correction_T_max  0.684
_exptl_absorpt_correction_T_min  0.201
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2012)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.860
_exptl_crystal_description       'transparent block'
_exptl_crystal_F_000             1048
_exptl_crystal_size_max          0.479
_exptl_crystal_size_mid          0.240
_exptl_crystal_size_min          0.120
_refine_diff_density_max         0.754
_refine_diff_density_min         -0.669
_refine_diff_density_rms         0.156
_refine_ls_abs_structure_details
;
 Flack x determined using 1443 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.451(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.222
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     220
_refine_ls_number_reflns         3475
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.222
_refine_ls_R_factor_all          0.0280
_refine_ls_R_factor_gt           0.0278
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0607P)^2^+1.9080P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0940
_refine_ls_wR_factor_ref         0.0940
_reflns_Friedel_coverage         0.715
_reflns_Friedel_fraction_full    0.991
_reflns_Friedel_fraction_max     0.988
_reflns_number_gt                3460
_reflns_number_total             3475
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4ce00323c2.cif
_cod_data_source_block           kaw46
_cod_database_code               7217456
_shelx_estimated_absorpt_t_min   0.081
_shelx_estimated_absorpt_t_max   0.365
_shelxl_version_number           2014-1
_shelx_res_checksum              36496