Low-temperature X-ray structural analysis of propanedinitrile derivatives substituted with a bis(4-dimethylaminophenyl)methyl group: the origin of elongation of the donor–acceptor substituted C–C bond†
Suzuki, Takanori; Ono, Kazunori; Kawai, Hidetoshi; Tsuji, Takashi; Journal of the Chemical Society, Perkin Transactions 2  (2001) 1798–; doi:10.1039/b103269k

data_7204152
_publ_section_title
;
 Low-temperature X-ray structural analysis of propanedinitrile
 derivatives substituted with a bis(4-dimethylaminophenyl)methyl group:
 the origin of elongation of the donor--acceptor substituted C--C
 bond&#x2020;
;
_journal_issue                   9
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 2'
_journal_page_first              1798
_journal_paper_doi               10.1039/b103269k
_journal_year                    2001
_chemical_formula_moiety         'C20 H20 N4 '
_chemical_formula_sum            'C20 H20 N4'
_chemical_formula_weight         316.40
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_audit_creation_date             'Thu Oct  5 17:10:12 2000'
_audit_creation_method           'by teXsan'
_cell_angle_alpha                90
_cell_angle_beta                 98.440(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.804(3)
_cell_length_b                   9.299(2)
_cell_length_c                   15.358(1)
_cell_measurement_temperature    123.2
_cell_volume                     1667.5(6)
_computing_data_reduction        'teXsan Ver. 1.10'
_computing_publication_material  'teXsan Ver. 1.10'
_computing_structure_refinement  'teXsan Ver. 1.10'
_computing_structure_solution    SIR92
_diffrn_measured_fraction_theta_full 0.9426
_diffrn_measured_fraction_theta_max 0.9426
_diffrn_measurement_device_type  'Rigaku/MSC Mercury CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.016
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            4945
_diffrn_reflns_theta_full        27.88
_diffrn_reflns_theta_max         27.88
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.260
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.300
_exptl_crystal_size_min          0.150
_refine_diff_density_max         0.21
_refine_diff_density_min         -0.19
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.947
_refine_ls_hydrogen_treatment    noref
_refine_ls_number_parameters     110
_refine_ls_number_reflns         1342
_refine_ls_R_factor_gt           0.0475
_refine_ls_shift/su_max          0.0002
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details     'w = 1/[\s^2^(Fo) + 0.00063|Fo|^2^]'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.0684
_reflns_number_gt                1342
_reflns_number_total             1873
_reflns_threshold_expression     F^2^>3.0\s(F^2^)
_cod_data_source_file            b103269k.txt
_cod_data_source_block           Ar2C_C(CN)2_-150_degree
_cod_original_cell_volume        1667.5(5)
_cod_original_formula_sum        'C20 H20 N4 '
_cod_database_code               7204152