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_4111990
_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            'C34 H64 F6 N4 O13 Rh2 S2'
_chemical_formula_weight         1120.83
_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                   11.7119(18)
_cell_length_b                   14.031(2)
_cell_length_c                   29.001(5)
_cell_measurement_reflns_used    970
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      22.52
_cell_measurement_theta_min      2.27
_cell_volume                     4765.7(13)
_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 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0622
_diffrn_reflns_av_sigmaI/netI    0.0779
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            34109
_diffrn_reflns_theta_full        27.95
_diffrn_reflns_theta_max         27.95
_diffrn_reflns_theta_min         1.88
_diffrn_standards_decay_%        <1
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.863
_exptl_absorpt_correction_T_max  0.9663
_exptl_absorpt_correction_T_min  0.9186
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.562
_exptl_crystal_density_meas      0
_exptl_crystal_description       needle
_exptl_crystal_F_000             2304
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.04
_refine_diff_density_max         1.453
_refine_diff_density_min         -0.644
_refine_diff_density_rms         0.123
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.04(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     586
_refine_ls_number_reflns         11412
_refine_ls_number_restraints     162
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0798
_refine_ls_R_factor_gt           0.0598
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0712P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1271
_refine_ls_wR_factor_ref         0.1364
_reflns_number_gt                9083
_reflns_number_total             11412
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja052254wsi20050407_035811.cif
_cod_data_source_block           ejc91
_cod_original_cell_volume        4765.8(13)
_cod_database_code               4111990