2,5-Bis[4-(dimethylamino)phenyl]-3,6-dimethylpyrazine
Moschel, Sebastian; Schollmeyer, Dieter; Detert, Heiner; Acta Crystallographica Section E 67 (2011) o1425–; doi:10.1107/S160053681101748X

data_2230254
_publ_section_title
;
 2,5-Bis[4-(dimethylamino)phenyl]-3,6-dimethylpyrazine
;
_journal_coeditor_code           BT5544
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1425
_journal_paper_doi               10.1107/S160053681101748X
_journal_volume                  67
_journal_year                    2011
_chemical_formula_iupac          'C22 H26 N4'
_chemical_formula_moiety         'C22 H26 N4'
_chemical_formula_sum            'C22 H26 N4'
_chemical_formula_weight         346.47
_chemical_melting_point          484
_chemical_name_common
;
2,5-Bis[4-(dimethylamino)phenyl]-3,6-dimethylpyrazine
;
_chemical_name_systematic
;
4-{5-[4-(dimethylamino)phenyl]-3,6-dimethylpyrazin-2-yl}-
<i>N</i>,<i>N</i>-dimethylaniline
;
_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                73.300(10)
_cell_angle_beta                 69.465(11)
_cell_angle_gamma                74.446(10)
_cell_formula_units_Z            2
_cell_length_a                   9.4590(10)
_cell_length_b                   9.6368(16)
_cell_length_c                   11.9661(15)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      69
_cell_measurement_theta_min      60
_cell_volume                     961.2(2)
_computing_cell_refinement       '<i>CAD-4 Software</i> (Enraf--Nonius, 1989)'
_computing_data_collection       '<i>CAD-4 Software</i> (Enraf--Nonius, 1989)'
_computing_data_reduction        'CORINC (Dr\"ager & Gattow, 1971)'
_computing_molecular_graphics    'PLATON (Spek, 2009)'
_computing_publication_material  'PLATON (Spek, 2009)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR97 (Altomare <i>et al.</i>, 1999)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'Enraf--Nonius CAD-4'
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0266
_diffrn_reflns_av_sigmaI/netI    0.0289
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            3876
_diffrn_reflns_theta_full        70.00
_diffrn_reflns_theta_max         70.00
_diffrn_reflns_theta_min         4.04
_diffrn_standards_decay_%        2
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.559
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.197
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             372
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.432
_refine_diff_density_min         -0.422
_refine_ls_extinction_coef       0.012(2)
_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   1.074
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     242
_refine_ls_number_reflns         3646
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.074
_refine_ls_R_factor_all          0.0781
_refine_ls_R_factor_gt           0.0627
_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^)+(0.1432P)^2^+0.2122P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_obs         0.1858
_refine_ls_wR_factor_ref         0.2184
_reflns_number_gt                2922
_reflns_number_total             3646
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bt5544.cif
_cod_data_source_block           I
_cod_database_code               2230254
_cod_database_fobs_code          2230254