Terphenyl Ligand Stabilized Lead(II) Derivatives: Steric Effects and Lead-Lead Bonding in Diplumbenes
Shirley Hino; Marilyn Olmstead; Andrew D. Phillips; Robert J. Wright; Philip P. Power; Inorganic Chemistry 43 (2004) 7346–7352; doi:10.1021/ic049174y

data_4312003
_publ_section_title
;
 Terphenyl Ligand Stabilized Lead(II) Derivatives: Steric Effects and
 Lead-Lead Bonding in Diplumbenes
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              7346
_journal_page_last               7352
_journal_paper_doi               10.1021/ic049174y
_journal_volume                  43
_journal_year                    2004
_chemical_formula_moiety         'C45 H76 Pb Si4, 0.5(C6 H14)'
_chemical_formula_sum            'C48 H83 Pb Si4'
_chemical_formula_weight         979.69
_chemical_name_common            Ar*PbSi(SiMe3)3.0.5n-hexane
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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                 101.041(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.6824(12)
_cell_length_b                   15.9100(8)
_cell_length_c                   16.9291(10)
_cell_measurement_reflns_used    900
_cell_measurement_temperature    90(2)
_cell_measurement_theta_max      20.0
_cell_measurement_theta_min      2.4
_cell_volume                     5203.2(5)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART 5.054 (Bruker, 2003)'
_computing_data_reduction        'SAINT 6.33b (Bruker, 2002)'
_computing_molecular_graphics    'SHELXTL 5.1, XP (Sheldrick, 1994)'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      90(2)
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker SMART 1000'
_diffrn_measurement_method       \w
_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  0.0360
_diffrn_reflns_av_sigmaI/netI    0.0268
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            48145
_diffrn_reflns_theta_full        25.25
_diffrn_reflns_theta_max         25.25
_diffrn_reflns_theta_min         1.77
_diffrn_standards_decay_%        <0.1
_diffrn_standards_number         '50 frames remeasured'
_exptl_absorpt_coefficient_mu    3.363
_exptl_absorpt_correction_T_max  0.632
_exptl_absorpt_correction_T_min  0.346
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2.05 (Sheldrick, 2003)'
_exptl_crystal_colour            'light blue'
_exptl_crystal_density_diffrn    1.251
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2036
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.15
_refine_diff_density_max         1.309
_refine_diff_density_min         -0.698
_refine_diff_density_rms         0.078
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.131
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     546
_refine_ls_number_reflns         9371
_refine_ls_number_restraints     64
_refine_ls_restrained_S_all      1.136
_refine_ls_R_factor_all          0.0479
_refine_ls_R_factor_gt           0.0331
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0155P)^2^+11.0270P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0597
_refine_ls_wR_factor_ref         0.0644
_reflns_number_gt                7625
_reflns_number_total             9371
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ic049174ysi20040624_074118_7.cif
_cod_data_source_block           adp13
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4312003