Reduction of carbon monoxide by a tetrakis(aryloxide)diniobium complex having four bridging hydrides.
Kurogi, Takashi; Ishida, Yutaka; Hatanaka, Tsubasa; Kawaguchi, Hiroyuki; Dalton transactions (Cambridge, England : 2003) 42 (2013) 7510–7513; doi:10.1039/c2dt32798h

data_7021334
_publ_section_title
;
 Reduction of carbon monoxide by a tetrakis(aryloxide)diniobium complex
 having four bridging hydrides.
;
_journal_issue                   21
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7510
_journal_page_last               7513
_journal_paper_doi               10.1039/c2dt32798h
_journal_volume                  42
_journal_year                    2013
_chemical_formula_moiety         'C54 H70 Cl2 Nb O2, 2(C4 H8 O)'
_chemical_formula_sum            'C62 H86 Cl2 Nb O4'
_chemical_formula_weight         1059.12
_chemical_name_systematic
;
?
;
_space_group_IT_number           13
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ya'
_symmetry_space_group_name_H-M   'P 1 2/a 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                 110.853(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   21.571(8)
_cell_length_b                   10.906(4)
_cell_length_c                   24.181(9)
_cell_measurement_reflns_used    8536
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.1
_cell_volume                     5316(3)
_computing_cell_refinement       'CrystalClear (Rigaku Corp., 2009)'
_computing_data_collection       'CrystalClear (Rigaku Corp., 2009)'
_computing_data_reduction        'CrystalClear (Rigaku Corp., 2009)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_detector_area_resol_mean 13.6612
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Mercury375R CCD (2x2 bin mode)'
_diffrn_measurement_method       dtprofit.ref
_diffrn_radiation_detector       CCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.1129
_diffrn_reflns_av_sigmaI/netI    0.1099
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            52911
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.01
_exptl_absorpt_coefficient_mu    0.375
_exptl_absorpt_correction_T_max  0.9925
_exptl_absorpt_correction_T_min  0.9564
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            Green
_exptl_crystal_density_diffrn    1.323
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Platelet
_exptl_crystal_F_000             2260
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.02
_platon_squeeze_details
;
;
_refine_diff_density_max         1.386
_refine_diff_density_min         -0.809
_refine_diff_density_rms         0.109
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.073
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     598
_refine_ls_number_reflns         12181
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.1244
_refine_ls_R_factor_gt           0.0770
_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^)+(0.0914P)^2^+0.9222P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1792
_refine_ls_wR_factor_ref         0.2170
_reflns_number_gt                7665
_reflns_number_total             12181
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2dt32798h.txt
_cod_data_source_block           '[(ArO)2NbCl2](THF)2'
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P2/a
_cod_database_code               7021334