Highly enantioselective transfer hydrogenation of fluoroalkyl ketones.
Sterk, Damjan; Stephan, Michel; Mohar, Barbara; Organic letters 8 (2006) 5935–5938; doi:10.1021/ol062358r

data_1506293
_publ_section_title
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 Highly enantioselective transfer hydrogenation of fluoroalkyl ketones.
;
_journal_issue                   26
_journal_name_full               'Organic letters'
_journal_page_first              5935
_journal_page_last               5938
_journal_paper_doi               10.1021/ol062358r
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C9 H10 F3 N O'
_chemical_formula_weight         205.18
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.66480(10)
_cell_length_b                   8.1816(2)
_cell_length_c                   18.7439(4)
_cell_measurement_temperature    293(2)
_cell_volume                     1022.08(4)
_computing_cell_refinement       'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_data_reduction        'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Nonius Kappa CCD diffractometer'
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0237
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            2314
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.94
_exptl_absorpt_coefficient_mu    0.124
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
HKL SCALEPACK (Otwinowski & Minor, 1997)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.333
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             424
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.104
_refine_diff_density_min         -0.116
_refine_diff_density_rms         0.025
_refine_ls_abs_structure_details
;
  No conclusions about the absolute structure can be made, since 
  the compound is a weak anomalous scatterer.
  See Flack H D (1983), Acta Cryst. A39, 876-881. 
;
_refine_ls_abs_structure_Flack   0.0(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.067
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     128
_refine_ls_number_reflns         2314
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.067
_refine_ls_R_factor_all          0.0538
_refine_ls_R_factor_gt           0.0416
_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^)+(0.0443P)^2^+0.1641P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1018
_refine_ls_wR_factor_ref         0.1110
_reflns_number_gt                1931
_reflns_number_total             2314
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol062358rsi20061108_040211.cif
_cod_data_source_block           k1159
_cod_database_code               1506293