Synthesis of Spirocyclic Diarylfluorenes by One-Pot Twofold SNAr Reactions of Diaryl Sulfones with Diarylmethanes.
Bhanuchandra, M.; Yorimitsu, Hideki; Osuka, Atsuhiro; Organic letters 18 (2016) 384–387; doi:10.1021/acs.orglett.5b03384

data_1542669
_publ_section_title
;
 Synthesis of Spirocyclic Diarylfluorenes by One-Pot Twofold SNAr
 Reactions of Diaryl Sulfones with Diarylmethanes.
;
_journal_issue                   3
_journal_name_full               'Organic letters'
_journal_page_first              384
_journal_page_last               387
_journal_paper_doi               10.1021/acs.orglett.5b03384
_journal_volume                  18
_journal_year                    2016
_chemical_formula_moiety         'C26 H15 F3 S'
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_symmetry_space_group_name_Hall  '-P 1'
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_atom_sites_solution_hydrogens   geom
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_cell_formula_units_Z            2
_cell_length_a                   7.4947(8)
_cell_length_b                   10.4244(11)
_cell_length_c                   12.3741(15)
_cell_measurement_reflns_used    1124
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_cell_measurement_theta_max      68.1
_cell_measurement_theta_min      25.8
_cell_volume                     943.36(19)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      93(2)
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_diffrn_measured_fraction_theta_full 0.972
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_diffrn_measurement_device_type  'Rigaku XtaLAB P200'
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_diffrn_radiation_monochromator  graphite
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_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -13
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_diffrn_reflns_point_group_measured_fraction_full 0.972
_diffrn_reflns_point_group_measured_fraction_max 0.969
_diffrn_reflns_theta_full        67.687
_diffrn_reflns_theta_max         68.240
_diffrn_reflns_theta_min         6.663
_exptl_absorpt_coefficient_mu    1.868
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.794
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'REQAB (Rigaku, 1998)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.466
_exptl_crystal_description       Prism
_exptl_crystal_F_000             428
_exptl_crystal_size_max          0.170
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_refine_diff_density_max         0.295
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_refine_diff_density_rms         0.066
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         3351
_refine_ls_number_restraints     0
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_refine_ls_R_factor_all          0.0350
_refine_ls_R_factor_gt           0.0331
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0550P)^2^+0.1354P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0909
_refine_ls_wR_factor_ref         0.0922
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3048
_reflns_number_total             3351
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol5b03384_si_002.cif
_cod_data_source_block           150901BH
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' according to
/usr/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_database_code               1542669
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.742
_shelx_estimated_absorpt_t_max   0.946
_shelx_res_checksum              64006
_shelx_hkl_checksum              2493