Self-assembled tetranuclear palladium catalysts that produce high molecular weight linear polyethylene.
Shen, Zhongliang; Jordan, Richard F.; Journal of the American Chemical Society 132 (2010) 52–53; doi:10.1021/ja909473y

data_4101645
_publ_section_title
;
 Self-assembled tetranuclear palladium catalysts that produce high
 molecular weight linear polyethylene.
;
_journal_issue                   1
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              52
_journal_page_last               53
_journal_paper_doi               10.1021/ja909473y
_journal_volume                  132
_journal_year                    2010
_chemical_formula_sum            'C42 H38 Cl4 O12 P2 Pd2 S4'
_chemical_formula_weight         1279.58
_space_group_IT_number           14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 110.23(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.764(5)
_cell_length_b                   14.101(7)
_cell_length_c                   18.639(7)
_cell_measurement_reflns_used    1024
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.07
_cell_measurement_theta_min      1.86
_cell_volume                     2408(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0936
_diffrn_reflns_av_sigmaI/netI    0.0762
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            21048
_diffrn_reflns_theta_full        25.07
_diffrn_reflns_theta_max         25.07
_diffrn_reflns_theta_min         1.86
_exptl_absorpt_coefficient_mu    1.269
_exptl_absorpt_correction_T_max  0.9510
_exptl_absorpt_correction_T_min  0.6869
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
absorption corrections were made based on correspondance of
equivalent intensities usingprogram SADABS (G. Sheldrick, Bruker 
Analytical X-ray Systems, Madison, WI)
;
_exptl_crystal_density_diffrn    1.765
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1280
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.991
_refine_diff_density_min         -1.060
_refine_diff_density_rms         0.117
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.997
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     317
_refine_ls_number_reflns         4266
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.997
_refine_ls_R_factor_all          0.0682
_refine_ls_R_factor_gt           0.0463
_refine_ls_shift/su_max          0.704
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0416P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0903
_refine_ls_wR_factor_ref         0.0962
_reflns_number_gt                3252
_reflns_number_total             4266
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja909473y_si_006.cif
_cod_data_source_block           zhon03z
_cod_original_cell_volume        2408.0(19)
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               4101645