Stereomutation of Conformational Enantiomers of 9-Isopropyl-9-formylfluorene and Related Acyl Derivatives
Daniele Casarini; Lodovico Lunazzi; Andrea Mazzanti; Journal of Organic Chemistry 73 (2008) 6382–6385; doi:10.1021/jo8008897

data_4023605
_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
;
 Stereomutation of Conformational Enantiomers of
 9-Isopropyl-9-formylfluorene and Related Acyl Derivatives
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              6382
_journal_page_last               6385
_journal_paper_doi               10.1021/jo8008897
_journal_volume                  73
_journal_year                    2008
_chemical_formula_sum            'C21 H24 O'
_chemical_formula_weight         292.40
_chemical_name_common            'compound 3'
_chemical_name_systematic
; 
 1-(9-isopropyl-9H-fluoren-9-yl)-2,2-dimethylpropan-1-one  
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             03/04/2007
_audit_creation_method           SHELXL-97
_audit_update_record             08/04/2007
_cell_angle_alpha                90.00
_cell_angle_beta                 111.089(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.0710(10)
_cell_length_b                   25.085(3)
_cell_length_c                   9.1420(12)
_cell_measurement_reflns_used    512
_cell_measurement_temperature    296(2)
_cell_volume                     1726.9(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.943
_diffrn_measurement_device_type  'Bruker APEX'
_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  0.0253
_diffrn_reflns_av_sigmaI/netI    0.0174
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -33
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            19719
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.65
_diffrn_reflns_theta_min         1.62
_exptl_absorpt_coefficient_mu    0.067
_exptl_absorpt_correction_T_max  0.9867
_exptl_absorpt_correction_T_min  0.9737
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.125
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       brick
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.242
_refine_diff_density_min         -0.177
_refine_diff_density_rms         0.031
_refine_ls_extinction_coef       0.032(5)
_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   1.892
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     205
_refine_ls_number_reflns         4184
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.892
_refine_ls_R_factor_all          0.0576
_refine_ls_R_factor_gt           0.0478
_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^)+(0.0663P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1648
_refine_ls_wR_factor_ref         0.1726
_reflns_number_gt                3395
_reflns_number_total             4184
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo8008897-file004.cif
_cod_data_source_block           p21ctbu
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4023605