Aggregation-induced and crystallization-enhanced emissions of 1,2-diphenyl-3,4-bis(diphenylmethylene)-1-cyclobutene.
Dong, Yongqiang; Lam, Jacky W Y; Qin, Anjun; Sun, Jiaxin; Liu, Jianzhao; Li, Zhen; Sun, Jingzhi; Sung, Herman H Y; Williams, Ian D; Kwok, Hoi Sing; Tang, Ben Zhong; Chemical communications (Cambridge, England)  (2007) 3255–3257; doi:10.1039/b704794k

data_7102069
_publ_section_title
;
 Aggregation-induced and crystallization-enhanced emissions of
 1,2-diphenyl-3,4-bis(diphenylmethylene)-1-cyclobutene.
;
_journal_issue                   31
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              3255
_journal_page_last               3257
_journal_paper_doi               10.1039/b704794k
_journal_year                    2007
_chemical_formula_sum            'C46 H38 O'
_chemical_formula_weight         606.76
_chemical_name_systematic
;
?
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 92.159(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.641(10)
_cell_length_b                   16.858(9)
_cell_length_c                   9.925(5)
_cell_measurement_reflns_used    1523
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.75
_cell_measurement_theta_min      2.41
_cell_volume                     3284(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.961
_diffrn_measured_fraction_theta_max 0.961
_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  0.0358
_diffrn_reflns_av_sigmaI/netI    0.0573
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            6834
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         2.57
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.82
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.227
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       bar
_exptl_crystal_F_000             1288
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.407
_refine_diff_density_min         -0.264
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     210
_refine_ls_number_reflns         2943
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0750
_refine_ls_R_factor_gt           0.0560
_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^)+(0.0673P)^2^+2.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1302
_refine_ls_wR_factor_ref         0.1393
_reflns_number_gt                2308
_reflns_number_total             2943
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b704794k.txt
_cod_data_source_block           1
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7102069