Biferrocene-Based Diphosphine Ligands: Synthesis and Application of Walphos Analogues in Asymmetric Hydrogenations
Zirakzadeh, Afrooz; Groß, Manuela A.; Wang, Yaping; Mereiter, Kurt; Spindler, Felix; Weissensteiner, Walter; Organometallics 32 (2013) 1075–; doi:10.1021/om3012147

data_4080086
_publ_section_title
;
 Biferrocene-Based Diphosphine Ligands: Synthesis and Application of
 Walphos Analogues in Asymmetric Hydrogenations
;
_journal_issue                   4
_journal_name_full               Organometallics
_journal_page_first              1075
_journal_paper_doi               10.1021/om3012147
_journal_volume                  32
_journal_year                    2013
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C24 H29 B Br Fe2 N'
_chemical_formula_sum            'C24 H29 B Br Fe2 N'
_chemical_formula_weight         533.90
_chemical_name_common
'1574 ww yw46 (R,SFc,RFc)-3.BH3, isomer of 1521'
_chemical_name_systematic
; 
(R~Fc~)-2''-Bromo-(S~Fc~)-2-[(R)-1-N,N-dimethylaminoethyl-\kN]
-1,1''-biferrocene trihydridoboron
;
_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                   8.5531(2)
_cell_length_b                   10.3363(2)
_cell_length_c                   26.0765(5)
_cell_measurement_reflns_used    9092
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.58
_cell_measurement_theta_min      2.51
_cell_volume                     2305.36(8)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT, SADABS, XPREP'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker kappa APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0345
_diffrn_reflns_av_sigmaI/netI    0.0180
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            59062
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         30.00
_diffrn_reflns_theta_min         2.12
_exptl_absorpt_coefficient_mu    3.002
_exptl_absorpt_correction_T_max  0.77
_exptl_absorpt_correction_T_min  0.62
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'program SADABS'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.538
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1088
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.973
_refine_diff_density_min         -0.226
_refine_diff_density_rms         0.060
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.001(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     266
_refine_ls_number_reflns         6701
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0233
_refine_ls_R_factor_gt           0.0214
_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^)+(0.0323P)^2^+0.4583P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0524
_refine_ls_wR_factor_ref         0.0531
_reflns_number_gt                6423
_reflns_number_total             6701
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om3012147_si_001.cif
_cod_data_source_block           RSR3BH=1574
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               4080086