(2<i>E</i>,6<i>E</i>)-2,6-Bis(4-ethoxybenzylidene)cyclohexanone
Shi, Xiaopeng; Li, Shuqin; Liu, Zhenzhen; Acta Crystallographica Section E 64 (2008) o2199–; doi:10.1107/S1600536808034272

data_2219761
_publ_section_title
;
 (2<i>E</i>,6<i>E</i>)-2,6-Bis(4-ethoxybenzylidene)cyclohexanone
;
_journal_coeditor_code           BG2205
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2199
_journal_paper_doi               10.1107/S1600536808034272
_journal_volume                  64
_journal_year                    2008
_chemical_formula_iupac          'C24 H26 O3'
_chemical_formula_moiety         'C24 H26 O3'
_chemical_formula_sum            'C24 H26 O3'
_chemical_formula_weight         362.45
_chemical_name_systematic
;
(2<i>E</i>,6<i>E</i>)-2,6-Bis(4-ethoxybenzylidene)cyclohexanone
;
_space_group_IT_number           36
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'C 2c -2'
_symmetry_space_group_name_H-M   'C m c 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   24.2516(6)
_cell_length_b                   10.8459(3)
_cell_length_c                   7.5270(2)
_cell_measurement_reflns_used    1880
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      21.43
_cell_measurement_theta_min      2.71
_cell_volume                     1979.83(9)
_computing_cell_refinement       'SMART (Bruker, 2001)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        'SAINT (Bruker, 1999)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART 4K CCD area-detector'
_diffrn_measurement_method       '\f and \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  0.1207
_diffrn_reflns_av_sigmaI/netI    0.0699
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            6002
_diffrn_reflns_theta_full        25.48
_diffrn_reflns_theta_max         25.48
_diffrn_reflns_theta_min         1.68
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  0.9922
_exptl_absorpt_correction_T_min  0.9744
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.216
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.197
_refine_diff_density_min         -0.140
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     129
_refine_ls_number_reflns         1026
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0557
_refine_ls_R_factor_gt           0.0483
_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^)+(0.0642P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1106
_refine_ls_wR_factor_ref         0.1148
_reflns_number_gt                879
_reflns_number_total             1026
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bg2205.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 'Orthorhombic' changed to
'orthorhombic' 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_Hall     C2c-2
_cod_database_code               2219761
_cod_database_fobs_code          2219761