Halogen⋯halogen interactions in assembling β-sheets into 2D layers in the bis-(4-halo-phenylamido)alkanes and their co-crystals via inter-halogen interactions
Samai, Suman; Biradha, Kumar; CrystEngComm 11 (2009) 482–492; doi:10.1039/b813263a

data_7215575
_publ_section_title
;
 Halogen&#x22EF;halogen interactions in assembling \b-sheets into 2D
 layers in the bis-(4-halo-phenylamido)alkanes and their co-crystals via
 inter-halogen interactions
;
_journal_coden_ASTM              CRECF4
_journal_issue                   3
_journal_name_full               CrystEngComm
_journal_page_first              482
_journal_page_last               492
_journal_paper_doi               10.1039/b813263a
_journal_volume                  11
_journal_year                    2009
_chemical_formula_sum            'C18 H18 F2 N2 O2'
_chemical_formula_weight         332.34
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                   11.3328(8)
_cell_length_b                   9.5211(6)
_cell_length_c                   15.3985(11)
_cell_measurement_reflns_used    1814
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.00
_cell_measurement_theta_min      2.65
_cell_volume                     1661.5(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD APEX 2 Bruker'
_diffrn_measurement_method       hemisphere
_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  0.0305
_diffrn_reflns_av_sigmaI/netI    0.0154
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            20610
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         2.65
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_T_max  0.990
_exptl_absorpt_correction_T_min  0.980
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.329
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Needle
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.210
_refine_diff_density_min         -0.210
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     109
_refine_ls_number_reflns         1814
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0629
_refine_ls_R_factor_gt           0.0459
_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^)+(0.0817P)^2^+0.3604P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1377
_refine_ls_wR_factor_ref         0.1483
_reflns_number_gt                1373
_reflns_number_total             1814
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             7200347
_cod_data_source_file            b813263a.txt
_cod_data_source_block           3F
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

 Updated bibliographic information.

 Antanas Vaitkus,
 2019-09-18

 Marked entry as a duplicate of entry 7200347.

 Antanas Vaitkus,
 2019-09-18
;
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               7215575