Aerobic Oxidation of Pinacol by Vanadium(V) Dipicolinate Complexes: Evidence for Reduction to Vanadium(III)
Susan K. Hanson; R. Tom Baker; John C. Gordon; Brian L. Scott; Andrew D. Sutton; David L. Thorn; Journal of the American Chemical Society 131 (2009) 428–429; doi:10.1021/ja807522n

data_4103775
_publ_section_title
;
 Aerobic Oxidation of Pinacol by Vanadium(V) Dipicolinate Complexes:
 Evidence for Reduction to Vanadium(III)
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              428
_journal_page_last               429
_journal_paper_doi               10.1021/ja807522n
_journal_volume                  131
_journal_year                    2009
_chemical_formula_sum            'C44 H36 N8 O9 V2'
_chemical_formula_weight         922.69
_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_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                 121.545(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   28.459(5)
_cell_length_b                   8.6208(15)
_cell_length_c                   19.834(3)
_cell_measurement_temperature    120(1)
_cell_volume                     4147.0(12)
_computing_cell_refinement       'SAINT+, v. 7.06 (Bruker AXS, 2001)'
_computing_data_collection       'APEX II, v. 1.08 (Bruker AXS, 2003)'
_computing_data_reduction        'SAINT+, v. 7.06 (Bruker AXS, 2001)'
_computing_molecular_graphics    'SHELXTL, v. 6.10, (Bruker AXS, 2000)'
_computing_publication_material  'SHELXTL, v. 6.10, (Bruker AXS, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(1)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker D8 with APEXII CCD'
_diffrn_measurement_method       '\w 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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.1326
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -34
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            6629
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.31
_diffrn_reflns_theta_min         2.10
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.519
_exptl_absorpt_correction_T_max  0.9597
_exptl_absorpt_correction_T_min  0.9124
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2.03 (Sheldrick, 2001)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.478
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1896
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.764
_refine_diff_density_min         -0.517
_refine_diff_density_rms         0.083
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.767
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     286
_refine_ls_number_reflns         6629
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.767
_refine_ls_R_factor_all          0.1025
_refine_ls_R_factor_gt           0.0515
_refine_ls_shift/su_max          0.007
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0744P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1152
_refine_ls_wR_factor_ref         0.1319
_reflns_number_gt                3743
_reflns_number_total             6629
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja807522n_si_003.cif
_cod_data_source_block           apx756_hklf5m
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               4103775