Diphosphine and Diarsine Complexes of Germanium(II) Halides-Preparation, Spectroscopic, and Structural Studies
Fei Cheng; Andrew L. Hector; William Levason; Gillian Reid; Michael Webster; Wenjian Zhang; Inorganic Chemistry 49 (2010) 752–760; doi:10.1021/ic902068z

data_4314597
_publ_contact_author_address
;   School of Chemistry
    University of Southampton
    Southampton SO17 1BJ, UK
;
_publ_contact_author_email       gr@soton.ac.uk
_publ_contact_author_fax         '023 8059 3781'
_publ_contact_author_name        'Professor Gillian Reid'
_publ_contact_author_phone       '023 8059 3609'
_publ_section_title
;
 Diphosphine and Diarsine Complexes of Germanium(II) Halides-Preparation,
 Spectroscopic, and Structural Studies
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              752
_journal_page_last               760
_journal_paper_doi               10.1021/ic902068z
_journal_volume                  49
_journal_year                    2010
_chemical_formula_moiety         'C30 H24 Br2 Ge P2'
_chemical_formula_structural     '(C6 H4 (P (C6 H5)2)2) Ge Br2'
_chemical_formula_sum            'C30 H24 Br2 Ge P2'
_chemical_formula_weight         678.84
_chemical_name_systematic
; 
 Dibromo-1,2-bis(diphenylphosphanyl)benzene-germanium(II) 
;
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_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_author_name               'Webster, M.'
_audit_creation_date             2008-09-26
_audit_creation_method           'SHELXL-97 + hand edit'
_audit_update_record             '2009-09-18  Relabelled Br1/Br2'
_cell_angle_alpha                90.00
_cell_angle_beta                 98.068(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.578(3)
_cell_length_b                   14.164(3)
_cell_length_c                   18.588(3)
_cell_measurement_reflns_used    32774
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     2757.4(11)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Bruker-Nonius 95mm CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1082
_diffrn_reflns_av_sigmaI/netI    0.0866
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            36845
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         3.08
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    4.143
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.5331
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'G.M. Sheldrick, (2007). SADABS. Version 2007/2. Bruker AXS Inc.'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.635
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1344
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.511
_refine_diff_density_min         -0.703
_refine_diff_density_rms         0.128
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.018
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     316
_refine_ls_number_reflns         6287
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.0944
_refine_ls_R_factor_gt           0.0478
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0475P)^2^+0.6690P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0959
_refine_ls_wR_factor_ref         0.1109
_reflns_number_gt                4186
_reflns_number_total             6287
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            ic902068z_si_001_04.cif
_cod_data_source_block           08wz009
_cod_original_cell_volume        2757.4(10)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4314597