Bis(tetraphenylphosphonium) tris(oxalato-<i>O</i>,<i>O</i>')germanate(IV)
Dean, Philip A. W.; Dance, Ian G.; Craig, Donald C.; Scudder, Marcia L.; Acta Crystallographica Section C 57 (2001) 1030–1031; doi:10.1107/S0108270101009258

data_2012187
_publ_section_title
;
 Bis(tetraphenylphosphonium)
 tris(oxalato-<i>O</i>,<i>O</i>')germanate(IV)
;
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1030
_journal_page_last               1031
_journal_paper_doi               10.1107/S0108270101009258
_journal_volume                  57
_journal_year                    2001
_chemical_formula_moiety         '2C24 H20 P + , C6 O12 Ge 2-'
_chemical_formula_structural     '(C24 H20 P)2 [Ge (C2 O4)3]'
_chemical_formula_sum            'C54 H40 Ge O12 P2'
_chemical_formula_weight         1015.4
_chemical_name_systematic
;
Bis(tetraphenylphosphonium) (trioxalato-O,O')germanate(IV)
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_type_scat_source
'International Tables for X-ray Crystallography, Vol. IV'
_cell_angle_alpha                90
_cell_angle_beta                 104.340(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   22.759(5)
_cell_length_b                   13.618(2)
_cell_length_c                   15.813(3)
_cell_measurement_reflns_used    10
_cell_measurement_temperature    294
_cell_measurement_theta_max      27
_cell_measurement_theta_min      25
_cell_volume                     4748.3(16)
_computing_cell_refinement       'CAD-4 Operations Manual'
_computing_data_collection       'CAD-4 Operations Manual (Enraf-Nonius, 1977)'
_computing_data_reduction        'local programs'
_computing_molecular_graphics    'ORTEPII (Johnson, 1976)'
_computing_publication_material  'local programs'
_computing_structure_refinement  'RAELS (Rae, 1989)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_measurement_device_type  'Nonius CAD-4'
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.5418
_diffrn_reflns_av_R_equivalents  .017
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            4616
_diffrn_reflns_theta_max         70
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  30min
_diffrn_standards_number         1
_exptl_absorpt_coefficient_mu    2.044
_exptl_absorpt_correction_T_max  .90
_exptl_absorpt_correction_T_min  .64
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details   '(de Meulenaer & Tompa, 1965)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.42
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2088.0
_exptl_crystal_size_max          .15
_exptl_crystal_size_mid          .13
_exptl_crystal_size_min          .06
_refine_diff_density_max         .38
_refine_diff_density_min         -.40
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.78
_refine_ls_hydrogen_treatment    noref
_refine_ls_number_parameters     174
_refine_ls_number_reflns         3646
_refine_ls_R_factor_gt           .034
_refine_ls_shift/su_max          .013
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details     'w = 1/[\s^2^(F) + 0.0016F^2^]'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         .050
_reflns_number_gt                3646
_reflns_number_total             4439
_reflns_threshold_expression     I>3\s(I)
_cod_data_source_file            da1190.cif
_cod_data_source_block           I
_cod_original_cell_volume        4748(2)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2012187
_cod_database_fobs_code          2012187