Synthesis and Resolution of Substituted [5]Carbohelicenes.
Usui, Kazuteru; Yamamoto, Kosuke; Shimizu, Takashi; Okazumi, Mieko; Mei, Biao; Demizu, Yosuke; Kurihara, Masaaki; Suemune, Hiroshi; The Journal of organic chemistry 80 (2015) 6502–6508; doi:10.1021/acs.joc.5b00759

data_4031099
_publ_section_title
;
 Synthesis and Resolution of Substituted [5]Carbohelicenes.
;
_journal_issue                   12
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              6502
_journal_page_last               6508
_journal_paper_doi               10.1021/acs.joc.5b00759
_journal_volume                  80
_journal_year                    2015
_chemical_absolute_configuration 'CHOOSE rm ad rmad syn or unk'
_chemical_formula_moiety         'C32 H28 O4 S'
_chemical_formula_sum            'C32 H28 O4 S'
_chemical_formula_weight         508.63
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_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
_cell_angle_alpha                90.0000
_cell_angle_beta                 90.0000
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   7.3352(15)
_cell_length_b                   15.870(3)
_cell_length_c                   20.672(4)
_cell_measurement_temperature    90
_cell_volume                     2406.4(8)
_computing_cell_refinement       Unknown
_computing_data_collection       Unknown
_computing_data_reduction        Unknown
_computing_molecular_graphics    'CrystalStructure 4.1'
_computing_publication_material  'CrystalStructure 4.1 (Rigaku, 2014)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2011 (Burla, et al., 2012)'
_diffrn_ambient_temperature      90
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.965
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0208
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.965
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            26950
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.943
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.376
_diffrn_reflns_theta_min         2.352
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.174
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            NONE
_exptl_crystal_density_diffrn    1.404
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       NONE
_exptl_crystal_F_000             1072.00
_refine_diff_density_max         0.24
_refine_diff_density_min         -0.30
_refine_ls_abs_structure_details
'Flack, H. D. (1983), Acta Cryst. A39, 876-881.  2382 Friedel Pairs'
_refine_ls_abs_structure_Flack   0.01(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     334
_refine_ls_number_reflns         5672
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0278
_refine_ls_R_factor_gt           0.0267
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0362P)^2^+0.7857P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0690
_refine_ls_wR_factor_ref         0.0697
_reflns_number_gt                5533
_reflns_number_total             5672
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            jo5b00759_si_003.cif
_cod_data_source_block           141023yamamoto_0ms
_cod_depositor_comments
'Adding full bibliography for 4031098--4031100.cif.'
_cod_original_cell_volume        2406.4(9)
_cod_database_code               4031099