Strengthening π–π Interactions While Suppressing Csp2–H···π (T-Shaped) Interactions via Perfluoroalkylation: A Crystallographic and Computational Study That Supports the Beneficial Formation of 1-D π–π Stacked Aromatic Materials
Sun, Haoran; Tottempudi, Usha K.; Mottishaw, Jeffery D.; Basa, Prem N.; Putta, Anjaneyulu; Sykes, Andrew G.; Crystal Growth & Design 12 (2012) 5655–; doi:10.1021/cg301151u

data_4506958
_publ_section_title
;
 Strengthening \p--\p Interactions While Suppressing
 Csp2--H&#x00B7;&#x00B7;&#x00B7;\p (T-Shaped) Interactions via
 Perfluoroalkylation: A Crystallographic and Computational Study That
 Supports the Beneficial Formation of 1-D \p--\p Stacked Aromatic
 Materials
;
_journal_issue                   11
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              5655
_journal_paper_doi               10.1021/cg301151u
_journal_volume                  12
_journal_year                    2012
_chemical_formula_moiety         'C18 H6 F18 N2'
_chemical_formula_sum            'C18 H6 F18 N2'
_chemical_formula_weight         592.25
_chemical_name_common            4,4'-di-perfluorobutyl-2,2'-bipyridine
_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                85.068(3)
_cell_angle_beta                 85.602(3)
_cell_angle_gamma                88.840(3)
_cell_formula_units_Z            1
_cell_length_a                   5.0202(15)
_cell_length_b                   5.2709(16)
_cell_length_c                   18.535(6)
_cell_measurement_reflns_used    4197
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.39
_cell_measurement_theta_min      2.21
_cell_volume                     487.2(3)
_computing_cell_refinement       'SAINT (Bruker, 2003)'
_computing_data_collection       'Bruker APEXII (Bruker, 2006)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'Ortep3 for Windows (Farrugia, 1997)'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR 97'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0258
_diffrn_reflns_av_sigmaI/netI    0.0251
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            4427
_diffrn_reflns_theta_full        24.98
_diffrn_reflns_theta_max         24.98
_diffrn_reflns_theta_min         2.21
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.242
_exptl_absorpt_correction_T_max  0.9762
_exptl_absorpt_correction_T_min  0.9310
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.019
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             290.0
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.294
_refine_diff_density_min         -0.279
_refine_diff_density_rms         0.055
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.150
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     172
_refine_ls_number_reflns         1691
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.150
_refine_ls_R_factor_all          0.0368
_refine_ls_R_factor_gt           0.0347
_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^)+(0.0383P)^2^+0.3814P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0885
_refine_ls_wR_factor_ref         0.0896
_reflns_number_gt                1591
_reflns_number_total             1716
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg301151u_si_002.cif
_cod_data_source_block           11077
_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_cell_volume        487.1(3)
_cod_database_code               4506958