Establishing a Hierarchy of Halogen Bonding by Engineering Crystals without Disorder
Aaker Christer B.; Chopade, Prashant D.; Desper, John; Crystal Growth & Design 13 (2013) 4145–; doi:10.1021/cg400988m

data_4508292
_publ_section_title
;
 Establishing a Hierarchy of Halogen Bonding by Engineering Crystals
 without Disorder
;
_journal_issue                   9
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              4145
_journal_paper_doi               10.1021/cg400988m
_journal_volume                  13
_journal_year                    2013
_chemical_formula_moiety
;
(C6 Br F4 I) (C8 H12 N2)2
;
_chemical_formula_sum            'C22 H24 Br F4 I N4'
_chemical_formula_weight         627.26
_chemical_name_systematic
;
PC-4-43-6 1-bromo-4-iodotetrafluorobenzene, (2,3,5,6-tetramethylpyrazine)2
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                70.354(2)
_cell_angle_beta                 69.519(2)
_cell_angle_gamma                83.639(2)
_cell_formula_units_Z            1
_cell_length_a                   7.0820(4)
_cell_length_b                   9.4394(5)
_cell_length_c                   9.9426(6)
_cell_measurement_reflns_used    3943
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      32.45
_cell_measurement_theta_min      3.07
_cell_volume                     586.38(6)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0479
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            8768
_diffrn_reflns_theta_full        34.02
_diffrn_reflns_theta_max         34.02
_diffrn_reflns_theta_min         2.29
_exptl_absorpt_coefficient_mu    3.118
_exptl_absorpt_correction_T_max  0.6353
_exptl_absorpt_correction_T_min  0.4756
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   TWINABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.776
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             308
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.975
_refine_diff_density_min         -0.711
_refine_diff_density_rms         0.121
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     150
_refine_ls_number_reflns         8768
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0387
_refine_ls_R_factor_gt           0.0344
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0450P)^2^+0.1000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0853
_refine_ls_wR_factor_ref         0.0877
_reflns_number_gt                7991
_reflns_number_total             8768
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg400988m_si_002.cif
_cod_data_source_block           pc1107m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4508292