Preparation of Chiral Cholestanofluorene and Its Electron-Rich Derivatives for Isolation of a Stable Cation-Radical Salt
Paromita Debroy; Ruchi Shukla; Sergey V. Lindeman; Rajendra Rathore; Journal of Organic Chemistry 72 (2007) 1765–1769; doi:10.1021/jo062300q

data_4022746
_publ_section_title
;
 Preparation of Chiral Cholestanofluorene and Its Electron-Rich
 Derivatives for Isolation of a Stable Cation-Radical Salt
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              1765
_journal_page_last               1769
_journal_paper_doi               10.1021/jo062300q
_journal_volume                  72
_journal_year                    2007
_chemical_formula_sum            'C27 H46 Br2'
_chemical_formula_weight         530.46
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 105.382(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.0432(16)
_cell_length_b                   7.7364(11)
_cell_length_c                   15.730(2)
_cell_measurement_reflns_used    4736
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      2.5
_cell_volume                     1295.7(3)
_computing_cell_refinement       'SAINT v7.23A (Bruker, 2005)'
_computing_data_collection       'APEX2 v2.0-2 (Bruker, 2005)'
_computing_data_reduction        'SADABS-2004/1 (Bruker, 2005)'
_computing_molecular_graphics    'XP v5.1 (Bruker, 1998)'
_computing_publication_material  'XCIF v6.12 (Bruker, 2001)'
_computing_structure_refinement  'SHELXL-97 v.97-2 (Sheldrick, 1993-1997)'
_computing_structure_solution    'XS/SHELXTL v6.12 (Bruker, 2001)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker APEX2 CCD detector'
_diffrn_measurement_method       '\w 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  0.0319
_diffrn_reflns_av_sigmaI/netI    0.0439
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            15585
_diffrn_reflns_theta_full        26.41
_diffrn_reflns_theta_max         26.41
_diffrn_reflns_theta_min         1.34
_exptl_absorpt_coefficient_mu    3.139
_exptl_absorpt_correction_T_max  0.8340
_exptl_absorpt_correction_T_min  0.3665
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.360
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'flat needles'
_exptl_crystal_F_000             556
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.644
_refine_diff_density_min         -0.336
_refine_diff_density_rms         0.069
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.026(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.977
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     262
_refine_ls_number_reflns         5280
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.977
_refine_ls_R_factor_all          0.0498
_refine_ls_R_factor_gt           0.0370
_refine_ls_shift/su_max          0.063
_refine_ls_shift/su_mean         0.007
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0597P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0918
_refine_ls_wR_factor_ref         0.0965
_reflns_number_gt                4212
_reflns_number_total             5280
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo062300qsi20061107_112706.cif
_cod_data_source_block           raj1j
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4022746