Allosteric effects in asymmetric hydrogenation catalysis? Asymmetric induction as a function of the substrate and the backbone flexibility of C1-symmetric diphosphines in rhodium-catalysed hydrogenations.
Baber, Angharad; de Vries, Johannes G.; Orpen, A. Guy; Pringle, Paul G.; von der Luehe, Karl; Dalton transactions (Cambridge, England : 2003)  (2006) 4821–4828; doi:10.1039/b607479k

data_7007568
_publ_section_title
;
 Allosteric effects in asymmetric hydrogenation catalysis? Asymmetric
 induction as a function of the substrate and the backbone flexibility
 of C1-symmetric diphosphines in rhodium-catalysed hydrogenations.
;
_journal_issue                   40
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              4821
_journal_page_last               4828
_journal_paper_doi               10.1039/b607479k
_journal_year                    2006
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C21 H28 Cl2 P2 Pt'
_chemical_formula_sum            'C21 H28 Cl2 P2 Pt'
_chemical_formula_weight         608.36
_chemical_name_systematic
;
?
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 106.754(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.9411(11)
_cell_length_b                   11.7365(14)
_cell_length_c                   11.1592(14)
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      21.611
_cell_measurement_theta_min      2.379
_cell_volume                     1121.3(2)
_computing_cell_refinement       'Bruker SMART V5.054 (Bruker, 1998)'
_computing_data_collection       'Bruker SMART V5.054 (Bruker, 1998)'
_computing_data_reduction        'Bruker SAINT V6.0 (Bruker, 1998)'
_computing_molecular_graphics    'Bruker SHELXTL V6.1 (Bruker AXS, 2000)'
_computing_publication_material  'Bruker SHELXTL V6.1 (Bruker AXS, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 8.2
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'CCD area detector'
_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  0.0894
_diffrn_reflns_av_sigmaI/netI    0.1367
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            11948
_diffrn_reflns_theta_full        27.58
_diffrn_reflns_theta_max         27.58
_diffrn_reflns_theta_min         1.91
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    6.641
_exptl_absorpt_correction_T_max  1.000000
_exptl_absorpt_correction_T_min  0.131708
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2.10 (Sheldrick, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.802
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             592
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.25
_refine_diff_density_max         1.259
_refine_diff_density_min         -1.526
_refine_diff_density_rms         0.210
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.015(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.976
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     294
_refine_ls_number_reflns         5015
_refine_ls_number_restraints     101
_refine_ls_restrained_S_all      0.968
_refine_ls_R_factor_all          0.1017
_refine_ls_R_factor_gt           0.0559
_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^)+(0.0435P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0959
_refine_ls_wR_factor_ref         0.1108
_reflns_number_gt                3520
_reflns_number_total             5015
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b607479k.txt
_cod_data_source_block           2b_screamsad
_cod_original_sg_symbol_Hall     'P 2ybc'
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7007568