Structure, Conformation, Stereodynamics, Dimer Formation, and Absolute Configuration of Axially Chiral Atropisomers of Hindered Biphenyl Carbinols
Daniele Casarini; Lodovico Lunazzi; Michele Mancinelli; Andrea Mazzanti; Carlo Rosini; Journal of Organic Chemistry 72 (2007) 7667–7676; doi:10.1021/jo701481m

data_4024207
_publ_contact_author
;
Dr. Andrea Mazzanti
University of Bologna
Department of Organic Chemistry A.Mangini
Viale Risorgimento 4
40136 Bologna
Italy
;
_publ_contact_author_email       mazzand@ms.fci.unibo.it
_publ_contact_author_fax         '[039]051 209 3654'
_publ_contact_author_phone       '[039]051 209 3633'
_publ_section_title
;
 Structure, Conformation, Stereodynamics, Dimer Formation, and
 Absolute Configuration of Axially Chiral Atropisomers of
 Hindered Biphenyl Carbinols
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              7667
_journal_page_last               7676
_journal_paper_doi               10.1021/jo701481m
_journal_volume                  72
_journal_year                    2007
_chemical_formula_moiety         'C14 H14 O2'
_chemical_formula_sum            'C14 H14 O2'
_chemical_formula_weight         214.25
_chemical_name_systematic
; 
 biphenyl-2,2'-diyldimethanol  
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             27/03/2007
_audit_creation_method           SHELXL-97
_audit_update_record             30/06/2007
_cell_angle_alpha                90.00
_cell_angle_beta                 109.2630(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.7902(10)
_cell_length_b                   5.0003(4)
_cell_length_c                   18.5981(14)
_cell_measurement_reflns_used    379
_cell_measurement_temperature    571(2)
_cell_volume                     1122.85(15)
_computing_cell_refinement       'Bruker APEX 2 V1.0-27'
_computing_data_collection       'Bruker APEX 2 V1.0-27'
_computing_data_reduction        'Bruker APEX 2 V1.0-27'
_computing_molecular_graphics    'mercury 1.4.1'
_computing_publication_material  'mercury 1.4.1'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      571(2)
_diffrn_measured_fraction_theta_full 0.940
_diffrn_measured_fraction_theta_max 0.940
_diffrn_measurement_device_type  'Bruker APEX 2'
_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  0.0181
_diffrn_reflns_av_sigmaI/netI    0.0157
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            12247
_diffrn_reflns_theta_full        28.73
_diffrn_reflns_theta_max         28.73
_diffrn_reflns_theta_min         1.70
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.9835
_exptl_absorpt_correction_T_min  0.9594
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.267
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             456
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.251
_refine_diff_density_min         -0.202
_refine_diff_density_rms         0.038
_refine_ls_extinction_coef       0.026(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.105
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     154
_refine_ls_number_reflns         2737
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.105
_refine_ls_R_factor_all          0.0509
_refine_ls_R_factor_gt           0.0421
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0701P)^2^+0.1224P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1240
_refine_ls_wR_factor_ref         0.1291
_reflns_number_gt                2194
_reflns_number_total             2737
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo701481m_data_0824.cif
_cod_data_source_block           p21n
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4024207