NMR studies on the axial chirality of ortho-substituted push‒pull phenyl butadienesSpectroscopic investigations on butadiene derivatives, Part 10. For Part 9, see ref. 1.
Manfred Michalik; Thomas Freier; Helmut Reinkeb; Klaus Peseke; Journal of the Chemical Society, Perkin Transactions 2  (2002) 114–119; doi:10.1039/b107402b

data_7213505
_publ_section_title
;
 NMR studies on the axial chirality of ortho-substituted push--pull phenyl
 butadienesSpectroscopic investigations on butadiene derivatives, Part 10.
 For Part 9, see ref. 1.
;
_journal_issue                   1
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 2'
_journal_page_first              114
_journal_page_last               119
_journal_paper_doi               10.1039/b107402b
_journal_year                    2002
_chemical_formula_sum            'C23 H28 N4'
_chemical_formula_weight         360.49
_chemical_melting_point          476
_chemical_name_systematic
; 
2-Cyano-3-(2-isopropylphenyl)-5,5-bis(pyrrolidino)penta-2,4-dienenitrile 
;
_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                104.280(10)
_cell_angle_beta                 102.500(10)
_cell_angle_gamma                106.540(10)
_cell_formula_units_Z            2
_cell_length_a                   8.1540(10)
_cell_length_b                   12.0410(10)
_cell_length_c                   12.4450(10)
_cell_measurement_reflns_used    33
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      24.309
_cell_measurement_theta_min      5.434
_cell_volume                     1079.7(2)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_computing_data_reduction        'Bruker XSCANS'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'Bruker SHELXTL, Version 4.2  for MSDOS'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0320
_diffrn_reflns_av_sigmaI/netI    0.0678
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            2881
_diffrn_reflns_theta_full        22.00
_diffrn_reflns_theta_max         22.00
_diffrn_reflns_theta_min         2.11
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.067
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellowish
_exptl_crystal_density_diffrn    1.109
_exptl_crystal_density_meas      ?
_exptl_crystal_description       'piece of rod'
_exptl_crystal_F_000             388
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.171
_refine_diff_density_min         -0.123
_refine_diff_density_rms         0.033
_refine_ls_extinction_coef       0.026(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     245
_refine_ls_number_reflns         2652
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0829
_refine_ls_R_factor_gt           0.0552
_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^)+(0.0538P)^2^+0.2219P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1347
_refine_ls_wR_factor_ref         0.1561
_reflns_number_gt                1875
_reflns_number_total             2652
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b107402bsup1.cif
_cod_data_source_block           f158(6h)
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_cell_volume        1079.74(18)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7213505