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_7217452
_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_formula_moiety         'C16.36 H16.07 Cl0.64 N2'
_chemical_formula_sum            'C16.36 H16.07 Cl0.64 N2'
_chemical_formula_weight         263.48
_chemical_name_systematic
; 
 ? 
;
_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   geom
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.0409(2)
_cell_length_b                   8.0224(3)
_cell_length_c                   27.0534(10)
_cell_measurement_reflns_used    4932
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      66.890
_cell_measurement_theta_min      3.277
_cell_volume                     1311.08(8)
_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_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.997
_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  0.0445
_diffrn_reflns_av_unetI/netI     0.0259
_diffrn_reflns_Laue_measured_fraction_full 0.992
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            17744
_diffrn_reflns_point_group_measured_fraction_full 0.990
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         67.401
_diffrn_reflns_theta_min         3.267
_exptl_absorpt_coefficient_mu    1.783
_exptl_absorpt_correction_T_max  0.753
_exptl_absorpt_correction_T_min  0.574
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2012)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.335
_exptl_crystal_description       'transparent block'
_exptl_crystal_F_000             556.6
_exptl_crystal_size_max          0.380
_exptl_crystal_size_mid          0.280
_exptl_crystal_size_min          0.250
_refine_diff_density_max         0.184
_refine_diff_density_min         -0.172
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details
;
 Flack x determined using 833 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   0.049(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.191
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     193
_refine_ls_number_reflns         2351
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.196
_refine_ls_R_factor_all          0.0418
_refine_ls_R_factor_gt           0.0376
_refine_ls_shift/su_max          0.035
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0350P)^2^+0.4106P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0898
_refine_ls_wR_factor_ref         0.0914
_reflns_Friedel_coverage         0.670
_reflns_Friedel_fraction_full    0.986
_reflns_Friedel_fraction_max     0.992
_reflns_number_gt                2174
_reflns_number_total             2351
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4ce00323c2.cif
_cod_data_source_block           kaw85
_cod_database_code               7217452
_shelx_estimated_absorpt_t_min   0.551
_shelx_estimated_absorpt_t_max   0.664
_shelxl_version_number           2013-4
_shelx_res_checksum              85517