3,3',5,5'-Tetramethylbiphenyl-4,4'-dicarbonitrile
Britton, Doyle; Silva, Saliya A. de; Acta Crystallographica Section E 63 (2007) o2252–o2253; doi:10.1107/S1600536807014353

data_2213112
_publ_section_title
;
 3,3',5,5'-Tetramethylbiphenyl-4,4'-dicarbonitrile
;
_journal_coeditor_code           BG2037
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2252
_journal_page_last               o2253
_journal_paper_doi               10.1107/S1600536807014353
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C18 H16 N2'
_chemical_formula_moiety         'C18 H16 N2'
_chemical_formula_sum            'C18 H16 N2'
_chemical_formula_weight         260.33
_chemical_name_systematic
;
3,3',5,5'-Tetramethylbiphenyl-4,4'-dicarbonitrile
;
_space_group_IT_number           70
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-F 2uv 2vw'
_symmetry_space_group_name_H-M   'F d d d :2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXTL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   7.4694(19)
_cell_length_b                   16.812(4)
_cell_length_c                   22.514(6)
_cell_measurement_reflns_used    3571
_cell_measurement_temperature    174(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.0
_cell_volume                     2827.2(12)
_computing_cell_refinement       'SAINT (Bruker, 2003)'
_computing_data_collection       'SMART (Bruker, 2003)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1997)'
_diffrn_ambient_temperature      174(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART 1K CCD area-detector'
_diffrn_measurement_method       \w
_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  0.033
_diffrn_reflns_av_sigmaI/netI    0.016
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            7789
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         3.02
_diffrn_standards_decay_%        1
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.072
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.91
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '[SADABS (Sheldrick, 2003; Blessing, 1995)]'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.223
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1104
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.26
_refine_diff_density_min         -0.22
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.11
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     55
_refine_ls_number_reflns         820
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.11
_refine_ls_R_factor_all          0.052
_refine_ls_R_factor_gt           0.044
_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^)+(0.05P)^2^+4.02P], where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.109
_refine_ls_wR_factor_ref         0.113
_reflns_number_gt                731
_reflns_number_total             820
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bg2037.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'F d d d'
_cod_database_code               2213112
_cod_database_fobs_code          2213112