2-{3-Cyano-5,5-dimethyl-4-[6-(pyrrolidin-1-yl)hexa-1,3,5-trienyl]-2,5-dihydro-2-furylidene}malononitrile
Gainsford, Graeme J.; Bhuiyan, M. Delower H.; Kay, Andrew J.; Acta Crystallographica Section E 64 (2008) o2036–o2037; doi:10.1107/S1600536808028110

data_2219665
_publ_section_title
2-{3-Cyano-5,5-dimethyl-4-[6-(pyrrolidin-1-yl)hexa-1,3,5-trienyl]-2,5-dihydro-2-furylidene}malononitrile
_journal_coeditor_code           NG2475
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2036
_journal_page_last               o2037
_journal_paper_doi               10.1107/S1600536808028110
_journal_volume                  64
_journal_year                    2008
_chemical_formula_iupac          'C20 H20 N4 O'
_chemical_formula_moiety         'C20 H20 N4 O'
_chemical_formula_sum            'C20 H20 N4 O'
_chemical_formula_weight         332.40
_chemical_name_systematic
;2-{3-Cyano-5,5-dimethyl-4-[6-(pyrrolidin-1-yl)hexa-1,3,5-trienyl]-2,5-dihydro-
2-furylidene}malononitrile
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   12.6766(13)
_cell_length_b                   11.7603(13)
_cell_length_c                   24.164(3)
_cell_measurement_reflns_used    6328
_cell_measurement_temperature    116(2)
_cell_measurement_theta_max      25.03
_cell_measurement_theta_min      2.51
_cell_volume                     3602.4(7)
_computing_cell_refinement       'APEX2 (Bruker,2005)'
_computing_data_collection       'APEX2 (Bruker,2005)'
_computing_data_reduction        'SAINT (Bruker, 2005)'
_computing_molecular_graphics
;
ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2003)
;
_computing_publication_material
;
SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2003) and
Mercury (Macrae <i>et al.</i>,  2006)
;
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      116(2)
_diffrn_detector_area_resol_mean 8.192
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type
;
Bruker Nonius APEXII CCD area-detector
;
_diffrn_measurement_method       '\f and \w scans'
_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  0.0814
_diffrn_reflns_av_sigmaI/netI    0.0829
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            20272
_diffrn_reflns_theta_full        26.41
_diffrn_reflns_theta_max         26.41
_diffrn_reflns_theta_min         3.37
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.078
_exptl_absorpt_correction_T_max  1.0
_exptl_absorpt_correction_T_min  0.494
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.226
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1408
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.261
_refine_diff_density_min         -0.274
_refine_ls_extinction_coef       0.0124(13)
_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   0.977
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     229
_refine_ls_number_reflns         3641
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.977
_refine_ls_R_factor_all          0.1078
_refine_ls_R_factor_gt           0.0476
_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^)+(0.0633P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1058
_refine_ls_wR_factor_ref         0.1294
_reflns_number_gt                2078
_reflns_number_total             3641
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ng2475.cif
_cod_data_source_block           I
_cod_database_code               2219665
_cod_database_fobs_code          2219665