Europium(II) and Ytterbium(II) Cyclic Organohydroborates: An Europium(II) Complex with an Agostic Interaction
Xuenian Chen; Soyoung Lim; Christine E. Plečnik; Shengming Liu; Bin Du; Edward A. Meyers; Sheldon G. Shore; Inorganic Chemistry 43 (2004) 692–698; doi:10.1021/ic030249s

data_4310368
_publ_section_title
;
 Europium(II) and Ytterbium(II) Cyclic Organohydroborates: An Europium(II)
 Complex with an Agostic Interaction
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              692
_journal_page_last               698
_journal_paper_doi               10.1021/ic030249s
_journal_volume                  43
_journal_year                    2004
_chemical_formula_sum            'C32 H64 B2 Eu O4'
_chemical_formula_weight         686.41
_chemical_name_common
'Tetrakis(tetrahydrofuran)europium bis(cyclooctane-1,5-diyl dihydridoborate)'
_chemical_name_systematic
;
   ?
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   21.9748(3)
_cell_length_b                   9.30970(10)
_cell_length_c                   16.8162(2)
_cell_measurement_reflns_used    '10 frames'
_cell_measurement_temperature    150(2)
_cell_volume                     3440.24(7)
_computing_cell_refinement       'DENZO (Otwinowsky & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction        'DENZO (Otwinowsky & Minor, 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 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       'omega at 55/-55'
_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  0.065
_diffrn_reflns_av_sigmaI/netI    0.0305
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            52217
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.21
_exptl_absorpt_coefficient_mu    1.855
_exptl_absorpt_correction_T_max  0.8081
_exptl_absorpt_correction_T_min  0.8081
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.325
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'rectangular block'
_exptl_crystal_F_000             1444
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.12
_refine_diff_density_max         1.297
_refine_diff_density_min         -1.175
_refine_diff_density_rms         0.076
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.523(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.148
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     385
_refine_ls_number_reflns         5766
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.148
_refine_ls_R_factor_all          0.0430
_refine_ls_R_factor_gt           0.0314
_refine_ls_shift/su_max          0.063
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0258P)^2^+4.0298P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0654
_refine_ls_wR_factor_ref         0.0702
_reflns_number_gt                4990
_reflns_number_total             5766
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic030249s_1.cif
_cod_data_source_block           Compound1
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_database_code               4310368