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_4128205
_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         'C61 H118 Ge2 O2 Si8'
_chemical_formula_sum            'C61 H118 Ge2 O2 Si8'
_chemical_formula_weight         1253.45
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_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-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 98.1130(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   17.1325(2)
_cell_length_b                   23.6837(3)
_cell_length_c                   18.3085(3)
_cell_measurement_reflns_used    106632
_cell_measurement_temperature    103(2)
_cell_measurement_theta_max      25.499
_cell_measurement_theta_min      1.415
_cell_volume                     7354.52(18)
_computing_cell_refinement       HKL2000
_computing_data_collection       CrystalClear
_computing_data_reduction        HKL2000
_computing_molecular_graphics    'Yadokari-XG 2011 (Wakita Nemoto et al., 2011)'
_computing_publication_material  'Yadokari-XG 2011 (Wakita,Nemoto et al., 2011)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    SIR2004
_diffrn_ambient_temperature      103(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Rigaku Saturn'
_diffrn_measurement_method       \w
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.1276
_diffrn_reflns_av_unetI/netI     0.0518
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            106632
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.240
_diffrn_reflns_theta_max         25.499
_diffrn_reflns_theta_min         1.415
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.983
_exptl_absorpt_correction_T_max  0.827
_exptl_absorpt_correction_T_min  0.681
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 MULABS - Empirical Correction for Absorption Anisotropy.
 Blessing, R. H., Acta Cryst., A51, 33-38 (1995).
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.132
_exptl_crystal_description       plate
_exptl_crystal_F_000             2704
_exptl_crystal_size_max          0.170
_exptl_crystal_size_mid          0.140
_exptl_crystal_size_min          0.110
_refine_diff_density_max         1.921
_refine_diff_density_min         -1.086
_refine_diff_density_rms         0.150
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     803
_refine_ls_number_reflns         13677
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0723
_refine_ls_R_factor_gt           0.0520
_refine_ls_shift/su_max          0.073
_refine_ls_shift/su_mean         0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[?^2^(Fo^2^)+(0.0690P)^2^+13.9660P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1306
_refine_ls_wR_factor_ref         0.1454
_reflns_Friedel_coverage         0.000
_reflns_number_gt                11408
_reflns_number_total             13677
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja9b00129_si_003.cif
_cod_data_source_block           compound16
_cod_depositor_comments
;
The following automatic conversions were performed:
data name '__diffrn_source' replaced with '_diffrn_source'.

Automatic conversion script
Id: cif_correct_tags 4968 2017-02-21 14:55:21Z antanas 
;
_cod_database_code               4128205
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.851
_shelx_estimated_absorpt_t_max   0.900
_shelx_res_checksum              46420
_shelx_hkl_checksum              96969