(<i>E</i>,<i>E</i>)-<i>N</i>^1^,<i>N</i>^4^-Bis(2,6-difluorobenzylidene)butane-1,4-diamine
Khaledi, Mohammad; Kia, Reza; Clegg, William; Harrington, Ross W.; Acta Crystallographica Section E 67 (2011) o3108–; doi:10.1107/S1600536811044801

data_2232471
_publ_section_title
;
 (<i>E</i>,<i>E</i>)-<i>N</i>^1^,<i>N</i>^4^-Bis(2,6-difluorobenzylidene)butane-1,4-diamine
;
_journal_coeditor_code           SU2336
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3108
_journal_paper_doi               10.1107/S1600536811044801
_journal_volume                  67
_journal_year                    2011
_chemical_formula_iupac          'C18 H16 F4 N2'
_chemical_formula_moiety         'C18 H16 F4 N2'
_chemical_formula_sum            'C18 H16 F4 N2'
_chemical_formula_weight         336.33
_chemical_name_systematic
(<i>E</i>,<i>E</i>)-<i>N</i>^1^,<i>N</i>^4^-Bis(2,6-difluorobenzylidene)butane-1,4-diamine
_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                104.956(2)
_cell_angle_beta                 94.474(2)
_cell_angle_gamma                93.679(2)
_cell_formula_units_Z            2
_cell_length_a                   6.4672(8)
_cell_length_b                   8.9296(12)
_cell_length_c                   14.4939(19)
_cell_measurement_reflns_used    4637
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.27
_cell_measurement_theta_min      2.88
_cell_volume                     803.10(18)
_computing_cell_refinement       'SAINT (Bruker, 2005)'
_computing_data_collection       'SMART (Bruker, 2005)'
_computing_data_reduction        'SAINT (Bruker, 2005)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material
'SHELXTL (Sheldrick, 2008) and PLATON (Spek,2009)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type
;
Bruker SMART 1K CCD area-detector
;
_diffrn_measurement_method       '\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  0.0191
_diffrn_reflns_av_sigmaI/netI    0.0251
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            5828
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.37
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.115
_exptl_absorpt_correction_T_max  0.977
_exptl_absorpt_correction_T_min  0.962
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2005)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.391
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             348
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.248
_refine_diff_density_min         -0.174
_refine_ls_extinction_coef       0.0064(19)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   1.110
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         2819
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.110
_refine_ls_R_factor_all          0.0454
_refine_ls_R_factor_gt           0.0369
_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^)+(0.0437P)^2^+0.2616P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0931
_refine_ls_wR_factor_ref         0.0998
_reflns_number_gt                2394
_reflns_number_total             2819
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            su2336.cif
_cod_data_source_block           I
_cod_database_code               2232471
_cod_database_fobs_code          2232471