Two-point halogen bonding between 3,6-dihalopyromellitic diimides
Cao, Dennis; Hong, Michael; Blackburn, Anthea K.; Liu, Zhichang; Holcroft, James M.; Stoddart, J. Fraser; Chem. Sci. 5 (2014) 4242–; doi:10.1039/C4SC00999A

data_1516797
_publ_section_title
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 Two-point halogen bonding between 3,6-dihalopyromellitic diimides
;
_journal_issue                   11
_journal_name_full               'Chem. Sci.'
_journal_page_first              4242
_journal_paper_doi               10.1039/C4SC00999A
_journal_volume                  5
_journal_year                    2014
_chemical_formula_moiety         'C10 H2 Cl2 N2 O4'
_chemical_formula_sum            'C10 H2 Cl2 N2 O4'
_chemical_formula_weight         285.04
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2013-12-27
_audit_creation_method
;
Olex2 1.2
(compiled 2013.12.10 svn.r2853 for OlexSys, GUI svn.r4736)
;
_cell_angle_alpha                90
_cell_angle_beta                 90.693(15)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   7.1051(12)
_cell_length_b                   5.4752(10)
_cell_length_c                   12.252(2)
_cell_measurement_reflns_used    1838
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      64.872
_cell_measurement_theta_min      6.229
_cell_volume                     476.59(14)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      99.99
_diffrn_measured_fraction_theta_full 0.932
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0234
_diffrn_reflns_av_unetI/netI     0.0227
_diffrn_reflns_Laue_measured_fraction_full 0.932
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            2930
_diffrn_reflns_point_group_measured_fraction_full 0.932
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         64.867
_diffrn_reflns_theta_min         6.229
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    6.271
_exptl_absorpt_correction_T_max  0.7526
_exptl_absorpt_correction_T_min  0.6576
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2012/1 (Bruker,2012) was used for absorption correction.
wR2(int) was 0.0480 before and 0.0331 after correction.
The Ratio of minimum to maximum transmission is 0.8738.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.986
_exptl_crystal_description       plate
_exptl_crystal_F_000             284
_exptl_crystal_size_max          0.105
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.007
_refine_diff_density_max         0.348
_refine_diff_density_min         -0.228
_refine_diff_density_rms         0.072
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.099
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     82
_refine_ls_number_reflns         807
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.099
_refine_ls_R_factor_all          0.0365
_refine_ls_R_factor_gt           0.0313
_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^)+(0.0443P)^2^+0.5603P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0813
_refine_ls_wR_factor_ref         0.0844
_reflns_Friedel_coverage         0.000
_reflns_number_gt                723
_reflns_number_total             807
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4sc00999a1.cif
_cod_data_source_block           p21-c
_cod_depositor_comments
'Adding full bibliography for 1516792--1516797.cif.'
_cod_original_cell_volume        476.57(14)
_cod_database_code               1516797
_shelxl_version_number           2013-4
_shelx_estimated_absorpt_t_max   0.957
_shelx_estimated_absorpt_t_min   0.559
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All N(H) groups
2.a Aromatic/amide H refined with riding coordinates:
 N1(H1)
;
_shelx_res_checksum              35625
_shelx_hkl_checksum              91451