Reversible Isomerizations between 1,4-Digermabenzenes and 1,4-Digerma-Dewar-benzenes: Air-Stable Activators for Small Molecules.
Sugahara, Tomohiro; Guo, Jing-Dong; Hashizume, Daisuke; Sasamori, Takahiro; Tokitoh, Norihiro; Journal of the American Chemical Society 141 (2019) 2263–2267; doi:10.1021/jacs.9b00129

data_4128202
_publ_section_title
;
 Reversible Isomerizations between 1,4-Digermabenzenes and
 1,4-Digerma-Dewar-benzenes: Air-Stable Activators for Small Molecules.
;
_journal_issue                   6
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2263
_journal_page_last               2267
_journal_paper_doi               10.1021/jacs.9b00129
_journal_volume                  141
_journal_year                    2019
_chemical_formula_moiety         'C68 H118 Ge2 Si8, 0.5(C6H14)'
_chemical_formula_sum            'C71 H125 Ge2 Si8'
_chemical_formula_weight         1348.60
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
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_cell_angle_beta                 100.488(5)
_cell_angle_gamma                90
_cell_formula_units_Z            8
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_cell_length_c                   45.092(4)
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_cell_measurement_temperature    103(2)
_cell_measurement_theta_max      27.0
_cell_measurement_theta_min      1.46
_cell_volume                     15823(2)
_computing_cell_refinement       CrysAlisPro
_computing_data_collection       CrystalClear
_computing_data_reduction        CrysAlisPro
_computing_molecular_graphics
'Yadokari-XG 2011 (Wakita Nemoto et al., 2011)'
_computing_structure_refinement  'SHELXL-2016/4 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXT-2016/4 (Sheldrick, 2016)'
_diffrn_ambient_temperature      103(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'EIGER X 1M'
_diffrn_measurement_method       'Oscillation Photograph'
_diffrn_radiation_type           Synchrotron
_diffrn_radiation_wavelength     0.78255
_diffrn_reflns_av_R_equivalents  0.0672
_diffrn_reflns_av_unetI/netI     0.0723
_diffrn_reflns_Laue_measured_fraction_full 0.992
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       35
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       50
_diffrn_reflns_limit_l_min       -52
_diffrn_reflns_number            39715
_diffrn_reflns_point_group_measured_fraction_full 0.992
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        26.999
_diffrn_reflns_theta_max         26.999
_diffrn_reflns_theta_min         1.460
_diffrn_source                   'synchrotron radiation SPring-8 BL40XU'
_exptl_absorpt_coefficient_mu    1.181
_exptl_absorpt_correction_T_max  0.943
_exptl_absorpt_correction_T_min  0.871
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.46 (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.132
_exptl_crystal_description       block
_exptl_crystal_F_000             5816
_exptl_crystal_size_max          0.120
_exptl_crystal_size_mid          0.110
_exptl_crystal_size_min          0.050
_refine_diff_density_max         1.119
_refine_diff_density_min         -0.976
_refine_diff_density_rms         0.102
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     921
_refine_ls_number_reflns         12846
_refine_ls_number_restraints     385
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.1021
_refine_ls_R_factor_gt           0.0750
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0603P)^2^+168.0416P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1754
_refine_ls_wR_factor_ref         0.2051
_reflns_Friedel_coverage         0.000
_reflns_number_gt                9511
_reflns_number_total             12846
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja9b00129_si_003.cif
_cod_data_source_block           compound13
_cod_database_code               4128202
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.871
_shelx_estimated_absorpt_t_max   0.943
_shelx_res_checksum              7610
_shelx_hkl_checksum              14490