Germanium and Tin Analogues of Alkynes and Their Reduction Products
Lihung Pu; Andrew D. Phillips; Anne F. Richards; Matthias Stender; Richard S. Simons; Marilyn M. Olmstead; Philip P. Power; Journal of the American Chemical Society 125 (2003) 11626–11636; doi:10.1021/ja035711m

data_4114187
_publ_section_title
;
 Germanium and Tin Analogues of Alkynes and Their Reduction Products
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              11626
_journal_page_last               11636
_journal_paper_doi               10.1021/ja035711m
_journal_volume                  125
_journal_year                    2003
_chemical_formula_sum            'C75 H105 Ge2 Na'
_chemical_formula_weight         1174.81
_chemical_name_common            '[Bert*Ge]2Na.0.5hexane'
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 98.192(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.2725(15)
_cell_length_b                   20.169(2)
_cell_length_c                   24.160(2)
_cell_measurement_reflns_used    42
_cell_measurement_temperature    133(2)
_cell_measurement_theta_max      29.6
_cell_measurement_theta_min      4.3
_cell_volume                     6883.8(12)
_computing_cell_refinement       'Siemens P3'
_computing_data_collection       'Siemens P3'
_computing_data_reduction        'Siemens XDISK'
_computing_molecular_graphics    'SHELXTL 5.03, XP (Sheldrick, 1994)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      133(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Siemens P4'
_diffrn_measurement_method       2\q-\w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Siemens rotating anode'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0337
_diffrn_reflns_av_sigmaI/netI    0.0423
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            9312
_diffrn_reflns_theta_full        56.35
_diffrn_reflns_theta_max         56.35
_diffrn_reflns_theta_min         2.87
_diffrn_standards_decay_%        <0.1
_diffrn_standards_interval_count 198
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    1.414
_exptl_absorpt_correction_T_max  0.8054
_exptl_absorpt_correction_T_min  0.5157
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;XABS2: an empirical absorption correction program. Parkin, S.; Moezzi,
 B.; Hope, H. J. Appl. Cryst. 1995, 28, 53-56.
;
_exptl_crystal_colour            'red green dichroic'
_exptl_crystal_density_diffrn    1.134
_exptl_crystal_description       needle
_exptl_crystal_F_000             2520
_exptl_crystal_size_max          0.54
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.584
_refine_diff_density_min         -0.351
_refine_diff_density_rms         0.057
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     722
_refine_ls_number_reflns         8969
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0676
_refine_ls_R_factor_gt           0.0479
_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^)+(0.0443P)^2^+11.5536P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1056
_refine_ls_wR_factor_ref         0.1159
_reflns_number_gt                7064
_reflns_number_total             8969
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja035711msi20030421_060217_3.cif
_cod_data_source_block           mn1090
_cod_original_cell_volume        6884.0(12)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4114187