Synthesis of 1,4-bis[2,2-bis(4-alkoxyphenyl)vinyl]benzenes and side chain modulation of their solid-state emission.
An, Peng; Shi, Zi-Fa; Dou, Wei; Cao, Xiao-Ping; Zhang, Hao-Li; Organic letters 12 (2010) 4364–4367; doi:10.1021/ol101847w

data_1503225
_publ_section_title
;
 Synthesis of 1,4-bis[2,2-bis(4-alkoxyphenyl)vinyl]benzenes and side chain
 modulation of their solid-state emission.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              4364
_journal_page_last               4367
_journal_paper_doi               10.1021/ol101847w
_journal_volume                  12
_journal_year                    2010
_chemical_formula_sum            'C50 H58 O4'
_chemical_formula_weight         722.96
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 92.468(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.644(5)
_cell_length_b                   29.507(10)
_cell_length_c                   9.359(3)
_cell_measurement_reflns_used    1239
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      18.09
_cell_measurement_theta_min      2.58
_cell_volume                     4316(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_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  0.0915
_diffrn_reflns_av_sigmaI/netI    0.1098
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       35
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            22308
_diffrn_reflns_theta_full        25.10
_diffrn_reflns_theta_max         25.10
_diffrn_reflns_theta_min         1.38
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.069
_exptl_absorpt_correction_T_max  0.9877
_exptl_absorpt_correction_T_min  0.9824
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.113
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       stick
_exptl_crystal_F_000             1560
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.223
_refine_diff_density_min         -0.205
_refine_diff_density_rms         0.040
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.941
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     529
_refine_ls_number_reflns         7679
_refine_ls_number_restraints     56
_refine_ls_restrained_S_all      0.949
_refine_ls_R_factor_all          0.1797
_refine_ls_R_factor_gt           0.0662
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0754P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1414
_refine_ls_wR_factor_ref         0.1894
_reflns_number_gt                3068
_reflns_number_total             7679
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol101847w_si_005.cif
_cod_data_source_block           p21c
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1503225