Ligand-Based Reduction of CO2 to CO Mediated by an Anionic Niobium Nitride Complex
Jared S. Silvia; Christopher C. Cummins; Journal of the American Chemical Society 132 (2010) 2169–2171; doi:10.1021/ja910445r

data_4101929
_publ_contact_author_address
;Department of Chemistry
Massachusetts Institute of Technology
Cambridge, MA
02139
;
_publ_contact_author_email       ccummins@mit.edu
_publ_contact_author_name        'Christopher C. Cummins'
_publ_section_title
;
 Ligand-Based Reduction of CO2 to CO Mediated by an Anionic Niobium
 Nitride Complex
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2169
_journal_page_last               2171
_journal_paper_doi               10.1021/ja910445r
_journal_volume                  132
_journal_year                    2010
_chemical_formula_moiety         'C39 H57 N4 Nb O3, C2 H4 O0.5'
_chemical_formula_sum            'C41 H61 N4 Nb O3.5'
_chemical_formula_weight         758.85
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 96.863(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.4174(15)
_cell_length_b                   12.2901(10)
_cell_length_c                   16.7769(13)
_cell_measurement_reflns_used    9841
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.25
_cell_volume                     3975.0(5)
_computing_cell_refinement       'SAINT 7.46A (Bruker-AXS, 2008)'
_computing_data_collection       'APEX2 3.0 (Bruker-AXS, 2008)'
_computing_data_reduction        'SAINT 7.46A (Bruker-AXS, 2008)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker Smart APEX CCD'
_diffrn_measurement_method       'omega and phi scans'
_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  0.0859
_diffrn_reflns_av_sigmaI/netI    0.0517
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            75498
_diffrn_reflns_theta_full        27.55
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         1.06
_exptl_absorpt_coefficient_mu    0.345
_exptl_absorpt_correction_T_max  0.9829
_exptl_absorpt_correction_T_min  0.9186
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.268
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1616
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.869
_refine_diff_density_min         -0.729
_refine_diff_density_rms         0.080
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     485
_refine_ls_number_reflns         9136
_refine_ls_number_restraints     44
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0696
_refine_ls_R_factor_gt           0.0424
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0369P)^2^+5.3472P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0907
_refine_ls_wR_factor_ref         0.1037
_reflns_number_gt                6762
_reflns_number_total             9136
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja910445r_si_001_3.cif
_cod_data_source_block           Me-2
_cod_database_code               4101929