1,4-Bis(2,4,6-trimethylphenyl)-1,4-diazabuta-1,3-diene
Müller, Thomas; Schrecke, Britta; Bolte, Michael; Acta Crystallographica Section E 59 (2003) o1820–o1821; doi:10.1107/S1600536803024085

data_2202723
_publ_section_title
;
 1,4-Bis(2,4,6-trimethylphenyl)-1,4-diazabuta-1,3-diene
;
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1820
_journal_page_last               o1821
_journal_paper_doi               10.1107/S1600536803024085
_journal_volume                  59
_journal_year                    2003
_chemical_formula_iupac          'C20 H24 N2'
_chemical_formula_moiety         'C20 H24 N2'
_chemical_formula_sum            'C20 H24 N2'
_chemical_formula_weight         292.41
_chemical_name_systematic        ?
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 108.650(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   13.4860(10)
_cell_length_b                   4.4030(10)
_cell_length_c                   15.4350(10)
_cell_measurement_reflns_used    4522
_cell_measurement_temperature    173
_cell_measurement_theta_max      25
_cell_measurement_theta_min      1
_cell_volume                     868.4(2)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Siemens, 1995)'
_computing_data_reduction        'SAINT (Siemens, 1995)'
_computing_molecular_graphics    'XP in SHELXTL-Plus (Sheldrick, 1991)'
_computing_publication_material  'PLATON (Spek, 1990)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Siemens CCD three-circle'
_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  0.0441
_diffrn_reflns_av_sigmaI/netI    0.0269
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            11184
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         1.59
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  1200
_diffrn_standards_number         123
_exptl_absorpt_coefficient_mu    0.065
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'orange yellow'
_exptl_crystal_density_diffrn    1.118
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             316
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.28
_refine_diff_density_max         0.143
_refine_diff_density_min         -0.195
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     104
_refine_ls_number_reflns         1597
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0709
_refine_ls_R_factor_gt           0.0473
_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^)+(0.0577P)^2^+0.3320P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1096
_refine_ls_wR_factor_ref         0.1249
_reflns_number_gt                1167
_reflns_number_total             1597
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            lh6130.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2202723
_cod_database_fobs_code          2202723