Novel derivatives of hypervalent germanium: synthesis, structure, and stability
Lermontova, El'mira Kh.; Huan, MengMeng; Churakov, Andrei V.; Howard, Judith A. K.; Zabalov, Maxim V.; Karlov, Sergey S.; Zaitseva, Galina S.; Dalton Transactions  (2009) 4695–4702; doi:10.1039/b901885a

data_7001453
_publ_section_title
;
 Novel derivatives of hypervalent germanium: synthesis, structure, and
 stability
;
_journal_issue                   24
_journal_name_full               'Dalton Transactions'
_journal_page_first              4695
_journal_page_last               4702
_journal_paper_doi               10.1039/b901885a
_journal_year                    2009
_chemical_formula_moiety         'C20 H52 Cl2 Ge2 N6 Si4'
_chemical_formula_sum            'C20 H52 Cl2 Ge2 N6 Si4'
_chemical_formula_weight         705.12
_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                 90.501(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.744(3)
_cell_length_b                   14.569(2)
_cell_length_c                   13.503(2)
_cell_measurement_reflns_used    3108
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      22.857
_cell_measurement_theta_min      2.384
_cell_volume                     3293.8(9)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker SMART APEX'
_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  0.0428
_diffrn_reflns_av_sigmaI/netI    0.0734
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            18868
_diffrn_reflns_theta_full        28.00
_diffrn_reflns_theta_max         28.00
_diffrn_reflns_theta_min         2.06
_exptl_absorpt_coefficient_mu    2.154
_exptl_absorpt_correction_T_max  0.9188
_exptl_absorpt_correction_T_min  0.6726
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2004)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.422
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1472
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.971
_refine_diff_density_min         -0.475
_refine_diff_density_rms         0.112
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.962
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     319
_refine_ls_number_reflns         7896
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.962
_refine_ls_R_factor_all          0.0765
_refine_ls_R_factor_gt           0.0466
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0524P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1083
_refine_ls_wR_factor_ref         0.1179
_reflns_number_gt                5494
_reflns_number_total             7896
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b901885a.txt
_cod_data_source_block           12
_cod_original_cell_volume        3293.9(9)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7001453