Dynamic kinetic resolution in the asymmetric synthesis of atropisomeric biaryl[4] and [5]helicene quinones.
Latorre, Alfonso; Urbano, Antonio; Carreño, M Carmen; Chemical communications (Cambridge, England)  (2009) 6652–6654; doi:10.1039/b907653k

data_7104972
_publ_section_title
;
 Dynamic kinetic resolution in the asymmetric synthesis of
 atropisomeric biaryl[4] and [5]helicene quinones.
;
_journal_issue                   43
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              6652
_journal_page_last               6654
_journal_paper_doi               10.1039/b907653k
_journal_year                    2009
_chemical_formula_sum            'C34 H26 O3'
_chemical_formula_weight         482.55
_space_group_IT_number           1
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  'P 1'
_symmetry_space_group_name_H-M   'P 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                116.0420(10)
_cell_angle_beta                 90.402(3)
_cell_angle_gamma                95.849(4)
_cell_formula_units_Z            2
_cell_length_a                   10.1039(6)
_cell_length_b                   11.6511(7)
_cell_length_c                   11.8095(7)
_cell_measurement_reflns_used    19845
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      39.53
_cell_measurement_theta_min      2.80
_cell_volume                     1240.50(13)
_computing_cell_refinement       'Bruker-Nonius Apex v1.0-22 2002'
_computing_data_collection       'Bruker-Nonius Apex v1.0-22 2002'
_computing_data_reduction        'SAINT+ Version 7.06A Bruker-Nonius, 2004'
_computing_molecular_graphics    'Shelxtl Version 6.12 (Sheldrick, 2001)'
_computing_publication_material  'Shelxtl Version 6.12 (Sheldrick, 2001)'
_computing_structure_refinement  'Shelxtl Version 6.12 (Sheldrick, 2001)'
_computing_structure_solution    'Shelxtl Version 6.12 (Sheldrick, 2001)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 512
_diffrn_detector_type            '4K CCD area detector APEX II'
_diffrn_measured_fraction_theta_full 0.907
_diffrn_measured_fraction_theta_max 0.907
_diffrn_measurement_device_type  'Kappa 4-axis goniometer bruker-nonius'
_diffrn_measurement_method
;
Fullsphere data collection, phi and omega scans
;
_diffrn_radiation_monochromator  'Multilayer Montel 200 mirrors'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0385
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            22716
_diffrn_reflns_theta_full        39.53
_diffrn_reflns_theta_max         39.53
_diffrn_reflns_theta_min         2.80
_diffrn_source                   'rotating anode X-ray tube'
_diffrn_source_current           70
_diffrn_source_power             50
_diffrn_source_size              '3 mm x 0.3 mm fine focus'
_diffrn_source_type              'Bruker-Nonius FR 591'
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.9883
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;
TWINABS; Sheldrick, G. TWINABS (Version 1.05), Bruker Nonius scaling and
corrections for twinned crystals University of Goettingen, Germany, 2003.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.292
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             508
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.692
_refine_diff_density_min         -0.379
_refine_diff_density_rms         0.089
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.5(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     672
_refine_ls_number_reflns         22716
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0651
_refine_ls_R_factor_gt           0.0584
_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^)+(0.1162P)^2^+0.0176P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1599
_refine_ls_wR_factor_ref         0.1639
_reflns_number_gt                19845
_reflns_number_total             22716
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b907653k.txt
_cod_data_source_block           p-ar-5t
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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      P1
_cod_database_code               7104972