Practical synthesis of chiral 9,9'-spirobixanthene-1,1'-diol.
Zhang, Weicheng; Wu, Shulin; Zhang, Zhaoguo; Yennawar, Hemant; Zhang, Xumu; Organic & biomolecular chemistry 4 (2006) 4474–4477; doi:10.1039/b610879b

data_7151322
_publ_section_title
;
 Practical synthesis of chiral 9,9'-spirobixanthene-1,1'-diol.
;
_journal_issue                   24
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              4474
_journal_page_last               4477
_journal_paper_doi               10.1039/b610879b
_journal_volume                  4
_journal_year                    2006
_chemical_absolute_configuration rm
_chemical_formula_moiety
'C27 H31 N2 O2, C25 H16 O4, 5(C2 H3 N), 0.764(C2 H3 N), Cl'
_chemical_formula_sum            'C63.53 H64.29 Cl N7.76 O6'
_chemical_formula_weight         1068.0
_chemical_name_systematic
;
?
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 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                   9.2512(15)
_cell_length_b                   19.807(3)
_cell_length_c                   34.048(5)
_cell_measurement_reflns_used    9251
_cell_measurement_temperature    98(2)
_cell_measurement_theta_max      25.820
_cell_measurement_theta_min      2.281
_cell_volume                     6238.9(17)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      98(2)
_diffrn_measured_fraction_theta_full 0.974
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0581
_diffrn_reflns_av_sigmaI/netI    0.0644
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       39
_diffrn_reflns_limit_l_min       -45
_diffrn_reflns_number            40270
_diffrn_reflns_theta_full        28.31
_diffrn_reflns_theta_max         28.31
_diffrn_reflns_theta_min         1.19
_exptl_absorpt_coefficient_mu    0.115
_exptl_absorpt_correction_T_max  0.979
_exptl_absorpt_correction_T_min  0.970
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.136
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       brick
_exptl_crystal_F_000             2258
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.364
_refine_diff_density_min         -0.902
_refine_diff_density_rms         0.078
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.29(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.070
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     723
_refine_ls_number_reflns         14773
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.070
_refine_ls_R_factor_all          0.0795
_refine_ls_R_factor_gt           0.0670
_refine_ls_shift/su_max          0.011
_refine_ls_shift/su_mean         0.006
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0788P)^2^+3.6591P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1627
_refine_ls_wR_factor_ref         0.1690
_reflns_number_gt                12467
_reflns_number_total             14773
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b610879b.txt
_cod_data_source_block           wuz1o
_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 
;
_cod_original_cell_volume        6238.7(17)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7151322