Reversibility Effects on the Stereoselectivity of Pt(II)-Mediated Cascade Poly-ene Cyclizations
Jeremiah A. Feducia; Michel R. Gagné; Journal of the American Chemical Society 130 (2008) 592–599; doi:10.1021/ja075518i

data_4107283
_publ_section_title
;
 Reversibility Effects on the Stereoselectivity of Pt(II)-Mediated Cascade
 Poly-ene Cyclizations
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              592
_journal_page_last               599
_journal_paper_doi               10.1021/ja075518i
_journal_volume                  130
_journal_year                    2008
_chemical_formula_moiety         '2(C50 H54 N O2 P3 Pt S), C H2 Cl2, 2(B F4) '
_chemical_formula_sum            'C50.5 H55 B Cl F4 N O2 P3 Pt S'
_chemical_formula_weight         1150.32
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           18
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 2'
_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                   18.7099(12)
_cell_length_b                   25.8448(13)
_cell_length_c                   10.7596(4)
_cell_measurement_reflns_used    975
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      22.31
_cell_measurement_theta_min      3.15
_cell_volume                     5202.8(5)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0862
_diffrn_reflns_av_sigmaI/netI    0.1031
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            24975
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.34
_exptl_absorpt_coefficient_mu    2.986
_exptl_absorpt_correction_T_max  0.860
_exptl_absorpt_correction_T_min  0.756
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.524
_exptl_crystal_description       needle
_exptl_crystal_F_000             2312
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         2.111
_refine_diff_density_min         -1.794
_refine_diff_density_rms         0.178
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.522(13)
_refine_ls_extinction_coef       0.00013(14)
_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   1.093
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     598
_refine_ls_number_reflns         9139
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.093
_refine_ls_R_factor_all          0.0979
_refine_ls_R_factor_gt           0.0706
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0898P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1536
_refine_ls_wR_factor_ref         0.1683
_reflns_number_gt                7068
_reflns_number_total             9139
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja075518i-file004.cif
_cod_data_source_block           c04238
_cod_database_code               4107283