A Cyclopentadienide Analogue Containing Divalent Germanium and a Heavy Cyclobutadiene-like Dianion with an Unusual Ge4 Core
Wenyuan Wang; Shenglai Yao; Christoph van Wüllen; Matthias Driess; Journal of the American Chemical Society 130 (2008) 9640–9641; doi:10.1021/ja802502b

data_4108119
_publ_contact_author_address
;Technische Universitaet Berlin
Institute of Chemistry: Metalorganics and Inorganic Materials 
Sekretariat C2  Strasse des 17. Juni 135
10623 Berlin Germany
;
_publ_contact_author_email       matthias.driess@tu-berlin.de
_publ_contact_author_fax         +49(0)30-314-29732
_publ_contact_author_name        'Matthias Driess'
_publ_contact_author_phone       +49(0)30-314-29731
_publ_section_title
;
 A Cyclopentadienide Analogue Containing Divalent Germanium and a Heavy
 Cyclobutadiene-like Dianion with an Unusual Ge4 Core
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              9640
_journal_page_last               9641
_journal_paper_doi               10.1021/ja802502b
_journal_volume                  130
_journal_year                    2008
_chemical_formula_sum            'C66 H100 Ge4 K2 N4 O2'
_chemical_formula_weight         1350.06
_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
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.29.10 (release 13-04-2006 CrysAlis171 .NET)
(compiled Apr 13 2006,12:24:59)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 96.311(14)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.370(3)
_cell_length_b                   14.8433(14)
_cell_length_c                   18.8725(19)
_cell_measurement_reflns_used    5910
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.7142
_cell_measurement_theta_min      2.9162
_cell_volume                     3444.2(10)
_computing_cell_refinement
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.29.10 (release 13-04-2006 CrysAlis171 .NET)
(compiled Apr 13 2006,12:24:59)
;
_computing_data_collection
;
CrysAlis CCD, Oxford Diffraction Ltd.,
Version 1.171.29.10 (release 13-04-2006 CrysAlis171 .NET)
(compiled Apr 13 2006,12:24:59)
;
_computing_data_reduction
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.29.10 (release 13-04-2006 CrysAlis171 .NET)
(compiled Apr 13 2006,12:24:59)
;
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Oxford Diffraction Xcalibur S Sapphire'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0487
_diffrn_reflns_av_sigmaI/netI    0.0848
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            17371
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.92
_exptl_absorpt_coefficient_mu    1.892
_exptl_absorpt_correction_T_max  0.807
_exptl_absorpt_correction_T_min  0.584
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.29.10 (release 13-04-2006 CrysAlis171 .NET)
(compiled Apr 13 2006,12:24:59)
Analytical numeric absorption correction using a multifaceted crystal
  model based on expressions derived by R.C. Clark & J.S. Reid.
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897)
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.302
_exptl_crystal_description       rod
_exptl_crystal_F_000             1412
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.504
_refine_diff_density_min         -0.460
_refine_diff_density_rms         0.068
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.914
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     364
_refine_ls_number_reflns         6032
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.919
_refine_ls_R_factor_all          0.0878
_refine_ls_R_factor_gt           0.0429
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0422P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0802
_refine_ls_wR_factor_ref         0.0885
_reflns_number_gt                3825
_reflns_number_total             6032
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja802502b-file003.cif
_cod_data_source_block           compound9
_cod_database_code               4108119