Asymmetric catalytic Mannich-type reaction of hydrazones with difluoroenoxysilanes using imidazoline-anchored phosphine ligand-zinc(ii) complexes.
Yuan, Zhiliang; Mei, Liangyong; Wei, Yin; Shi, Min; Kattamuri, Padmanabha V.; McDowell, Patrick; Li, Guigen; Organic & biomolecular chemistry 10 (2012) 2509–2513; doi:10.1039/c2ob07022g

data_7152267
_publ_section_title
;
 Asymmetric catalytic Mannich-type reaction of hydrazones with
 difluoroenoxysilanes using imidazoline-anchored phosphine ligand-zinc(ii)
 complexes.
;
_journal_issue                   13
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2509
_journal_page_last               2513
_journal_paper_doi               10.1039/c2ob07022g
_journal_volume                  10
_journal_year                    2012
_chemical_absolute_configuration ad
_chemical_formula_sum            'C22 H16 Br2 F2 N2 O2'
_chemical_formula_weight         538.19
_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                 104.895(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.249(4)
_cell_length_b                   5.5446(19)
_cell_length_c                   16.208(6)
_cell_measurement_reflns_used    4154
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      26.626
_cell_measurement_theta_min      2.408
_cell_volume                     1063.8(6)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_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      296(2)
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_device_type  'Bruker 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  0.0327
_diffrn_reflns_av_sigmaI/netI    0.0588
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            6946
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         1.72
_exptl_absorpt_coefficient_mu    3.849
_exptl_absorpt_correction_T_max  0.7455
_exptl_absorpt_correction_T_min  0.3083
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.680
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             532
_exptl_crystal_size_max          0.405
_exptl_crystal_size_mid          0.297
_exptl_crystal_size_min          0.198
_refine_diff_density_max         0.344
_refine_diff_density_min         -0.368
_refine_diff_density_rms         0.097
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.066(17)
_refine_ls_extinction_coef       0.009(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     280
_refine_ls_number_reflns         3597
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0677
_refine_ls_R_factor_gt           0.0519
_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^)+(0.0712P)^2^+0.4555P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1386
_refine_ls_wR_factor_ref         0.1486
_reflns_number_gt                2767
_reflns_number_total             3597
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ob07022g.txt
_cod_data_source_block           mo_dm1055_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               7152267