Reactions of the Heavier Group 14 Element Alkyne Analogues Ar'EEAr' (Ar' = C6H3-2,6(C6H3-2,6-Pri2)2; E = Ge, Sn) with Unsaturated Molecules: Probing the Character of the EE Multiple Bonds
Chunming Cui; Marilyn M. Olmstead; James C. Fettinger; Geoffrey H. Spikes; Philip P. Power; Journal of the American Chemical Society 127 (2005) 17530–17541; doi:10.1021/ja055372s

data_4112094
_publ_section_title
;
 Reactions of the Heavier Group 14 Element Alkyne Analogues Ar'EEAr' (Ar'
 = C6H3-2,6(C6H3-2,6-Pri2)2; E = Ge, Sn) with Unsaturated Molecules:
 Probing the Character of the EE Multiple Bonds
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              17530
_journal_page_last               17541
_journal_paper_doi               10.1021/ja055372s
_journal_volume                  127
_journal_year                    2005
_chemical_formula_sum            'C78 H98 Ge2 N2'
_chemical_formula_weight         1208.76
_chemical_name_common            '[Dipp*Ge(PhNNPh)GeDipp*].n-hexane'
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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                   20.743(4)
_cell_length_b                   12.008(2)
_cell_length_c                   27.095(5)
_cell_measurement_reflns_used    52
_cell_measurement_temperature    130(2)
_cell_measurement_theta_max      30.0
_cell_measurement_theta_min      3.2
_cell_volume                     6749(2)
_computing_cell_refinement       'Siemens P3-PC (1994)'
_computing_data_collection       'Siemens P3-PC (1994)'
_computing_data_reduction        'Siemens XDISK (1994)'
_computing_molecular_graphics    'SHELXTL 5.1, XP (Sheldrick, 1994)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      130(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Siemens P4'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'nickel filter'
_diffrn_radiation_source         'Siemens rotating anode'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0237
_diffrn_reflns_av_sigmaI/netI    0.0374
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -2
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       3
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            6496
_diffrn_reflns_theta_full        55.98
_diffrn_reflns_theta_max         55.98
_diffrn_reflns_theta_min         3.26
_diffrn_standards_decay_%        1.1
_diffrn_standards_interval_count 198
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    1.411
_exptl_absorpt_correction_T_max  0.693
_exptl_absorpt_correction_T_min  0.602
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.190
_exptl_crystal_description       prism
_exptl_crystal_F_000             2576
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.28
_refine_diff_density_max         0.380
_refine_diff_density_min         -0.315
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.42(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     758
_refine_ls_number_reflns         5171
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0384
_refine_ls_R_factor_gt           0.0328
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0467P)^2^+1.5261P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0750
_refine_ls_wR_factor_ref         0.0779
_reflns_number_gt                4765
_reflns_number_total             5171
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja055372ssi20050805_074806.cif
_cod_data_source_block           mn1550a
_cod_database_code               4112094