α-Dicationic Chelating Phosphines: Synthesis and Application to the Hydroarylation of Dienes.
Gu, Lianghu; Wolf, Lawrence M.; Zieliński, Adam; Thiel, Walter; Alcarazo, Manuel; Journal of the American Chemical Society 139 (2017) 4948–4953; doi:10.1021/jacs.7b01441

data_4126142
_publ_section_title
;
 \a-Dicationic Chelating Phosphines: Synthesis and Application to the
 Hydroarylation of Dienes.
;
_journal_issue                   13
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4948
_journal_page_last               4953
_journal_paper_doi               10.1021/jacs.7b01441
_journal_volume                  139
_journal_year                    2017
_chemical_compound_source        Methanol_Diethylether
_chemical_formula_moiety         'C28 H22'
_chemical_formula_sum            'C28 H22'
_chemical_formula_weight         358.45
_chemical_name_systematic
;
 ddd
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_block_code                AZ-132
_audit_creation_date             2016-11-03
_audit_creation_method
;
Olex2 1.2
(compiled 2015.09.30 svn.r3233 for OlexSys, GUI svn.r5103)
;
_cell_angle_alpha                90
_cell_angle_beta                 125.169(2)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   27.455(2)
_cell_length_b                   8.9353(7)
_cell_length_c                   19.0572(14)
_cell_measurement_reflns_used    2793
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      67.54
_cell_measurement_theta_min      32.50
_cell_volume                     3821.7(5)
_computing_cell_refinement       'SAINT software (Bruker AXS, 2004)'
_computing_data_collection       'APEX2 (Bruker AXS, 2005-2013)'
_computing_data_reduction        'SAINT software (Bruker AXS, 2004)'
_computing_molecular_graphics    'DIAMOND (Crystal Impact GbR, 1997-2014)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL (G. M. Sheldrick, 2013)'
_computing_structure_solution    'SHELXS (G. M. Sheldrick, 2013)'
_diffrn_ambient_temperature      100
_diffrn_detector_area_resol_mean 66.67
_diffrn_measured_fraction_theta_full 0.949
_diffrn_measured_fraction_theta_max 0.948
_diffrn_measurement_device_type  'Bruker AXS X8 Proteum'
_diffrn_measurement_method       'CCD \f- and \w-scans'
_diffrn_radiation_monochromator  'MONTEL graded multilayer optic'
_diffrn_radiation_source         '0.2 x 2mm^2^ focus rotating anode'
_diffrn_radiation_type           Cu-K\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0282
_diffrn_reflns_av_unetI/netI     0.0101
_diffrn_reflns_Laue_measured_fraction_full 0.949
_diffrn_reflns_Laue_measured_fraction_max 0.948
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            62737
_diffrn_reflns_point_group_measured_fraction_full 0.949
_diffrn_reflns_point_group_measured_fraction_max 0.948
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         67.735
_diffrn_reflns_theta_min         3.939
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.530
_exptl_absorpt_correction_T_max  0.97134
_exptl_absorpt_correction_T_min  0.89676
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details   'SADABS (Bruker AXS, 2012)'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.246
_exptl_crystal_description       block
_exptl_crystal_F_000             1520
_exptl_crystal_face_perp_dist    2.00
_exptl_crystal_size_max          0.412
_exptl_crystal_size_mid          0.177
_exptl_crystal_size_min          0.086
_refine_diff_density_max         0.157
_refine_diff_density_min         -0.211
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     254
_refine_ls_number_reflns         3282
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0383
_refine_ls_R_factor_gt           0.0371
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0546P)^2^+2.9088P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0975
_refine_ls_wR_factor_ref         0.0986
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3138
_reflns_number_total             3282
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja7b01441_si_008.cif
_cod_data_source_block           final_merged
_cod_database_code               4126142
_shelx_estimated_absorpt_t_max   0.956
_shelx_estimated_absorpt_t_min   0.811
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C17(H17)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C5(H5), C7(H7), C9(H9), C10(H10), C11(H11), C12(H12),
 C15(H15), C16(H16), C20(H20), C21(H21), C23(H23), C24(H24), C25(H25), C26(H26),
  C27(H27)
2.c Idealised Me refined as rotating group:
 C18(H18A,H18B,H18C)
;
_shelx_res_checksum              31111
_shelx_hkl_checksum              20923
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'