Catalysis of Enantioselective [2+1]-Cycloaddition Reactions of Ethyl Diazoacetate and Terminal Acetylenes Using Mixed-Ligand Complexes of the Series Rh2(RCO2)n(L*4-n). Stereochemical Heuristics for Ligand Exchange and Catalyst Synthesis
Yan Lou; Travis P. Remarchuk; E. J. Corey; Journal of the American Chemical Society 127 (2005) 14223–14230; doi:10.1021/ja052254w

data_4111992
_publ_section_title
;
 Catalysis of Enantioselective [2+1]-Cycloaddition Reactions of Ethyl
 Diazoacetate and Terminal Acetylenes Using Mixed-Ligand Complexes of the
 Series Rh2(RCO2)n(L*4-n). Stereochemical Heuristics for Ligand Exchange
 and Catalyst Synthesis
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14223
_journal_page_last               14230
_journal_paper_doi               10.1021/ja052254w
_journal_volume                  127
_journal_year                    2005
_chemical_formula_sum            'C12 H12 F6 N2 O8 Rh2'
_chemical_formula_weight         632.06
_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_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 97.301(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.2651(19)
_cell_length_b                   9.981(2)
_cell_length_c                   12.202(3)
_cell_measurement_temperature    193(2)
_cell_volume                     998.4(4)
_computing_cell_refinement       'SMART (BRUKER, V5.625, 2001)'
_computing_data_collection       'ASTRO (BRUKER, V5.007, 1997)'
_computing_data_reduction        'SAINT (BRUKER, V6.22, 2001)'
_computing_molecular_graphics    'SHELXTL (BRUKER, 2000, V6.1)'
_computing_publication_material  'XCIF (Sheldrick and BRUKER, 1997, V5.1)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      193(2)
_diffrn_detector_area_resol_mean 836.6
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker CCD'
_diffrn_measurement_method       '\w, 0.3 deg'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0216
_diffrn_reflns_av_sigmaI/netI    0.0274
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            6377
_diffrn_reflns_theta_full        27.87
_diffrn_reflns_theta_max         27.87
_diffrn_reflns_theta_min         2.65
_diffrn_standards_decay_%        <1
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.749
_exptl_absorpt_correction_T_max  0.9333
_exptl_absorpt_correction_T_min  0.7918
_exptl_absorpt_correction_type   semi-empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            red_purple
_exptl_crystal_density_diffrn    2.102
_exptl_crystal_density_meas      0
_exptl_crystal_description       plate
_exptl_crystal_F_000             612
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.04
_refine_diff_density_max         1.053
_refine_diff_density_min         -1.486
_refine_diff_density_rms         0.131
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.356
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     138
_refine_ls_number_reflns         2357
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.356
_refine_ls_R_factor_all          0.0637
_refine_ls_R_factor_gt           0.0589
_refine_ls_shift/su_max          0.020
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0213P)^2^+4.7801P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1029
_refine_ls_wR_factor_ref         0.1045
_reflns_number_gt                2257
_reflns_number_total             2357
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja052254wsi20050413_122921.cif
_cod_data_source_block           ejc84t
_cod_original_cell_volume        998.5(4)
_cod_database_code               4111992