High-spin ground states via electron delocalization in mixed-valence imidazolate-bridged divanadium complexes.
Bechlars, Bettina; D'Alessandro, Deanna M; Jenkins, David M.; Iavarone, Anthony T.; Glover, Starla D.; Kubiak, Clifford P.; Long, Jeffrey R.; Nature chemistry 2 (2010) 362–368; doi:10.1038/nchem.585

data_1508019
_publ_section_title
;
 High-spin ground states via electron delocalization in mixed-valence
 imidazolate-bridged divanadium complexes.
;
_journal_issue                   5
_journal_name_full               'Nature chemistry'
_journal_page_first              362
_journal_page_last               368
_journal_paper_doi               10.1038/nchem.585
_journal_volume                  2
_journal_year                    2010
_chemical_formula_moiety         'C29 H25 N5'
_chemical_formula_sum            'C29 H25 N5'
_chemical_formula_weight         443.54
_chemical_name_systematic
;
2,6-Bis[1,1-bis(2-pyridyl)ethyl]pyridine
;
_space_group_IT_number           41
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'A 2 -2ab'
_symmetry_space_group_name_H-M   'A b a 2'
_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                   17.919(4)
_cell_length_b                   15.190(4)
_cell_length_c                   8.255(2)
_cell_measurement_reflns_used    1775
_cell_measurement_temperature    190
_cell_measurement_theta_max      51.336
_cell_measurement_theta_min      5.365
_cell_volume                     2246.9(9)
_computing_cell_refinement       'Bruker SAINT v6.36'
_computing_data_collection       'Bruker SMART v5.054d'
_computing_data_reduction        'Bruker SAINT v6.36'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      190
_diffrn_detector_area_resol_mean 0
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker SMART CCD'
_diffrn_measurement_method       \w/2\q-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  0.0252
_diffrn_reflns_av_sigmaI/netI    0.0294
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            6062
_diffrn_reflns_theta_full        26.36
_diffrn_reflns_theta_max         26.36
_diffrn_reflns_theta_min         2.27
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  1.0
_exptl_absorpt_correction_T_min  0.846514
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'Blessing, 1995'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.311
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             936
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.153
_refine_diff_density_min         -0.209
_refine_diff_density_rms         0.041
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.838
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     155
_refine_ls_number_reflns         1775
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.838
_refine_ls_R_factor_all          0.0376
_refine_ls_R_factor_gt           0.0346
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0966
_refine_ls_wR_factor_ref         0.0990
_reflns_number_gt                1650
_reflns_number_total             1775
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            nchem.585-s2.cif
_cod_data_source_block           2
_cod_depositor_comments
;
 Replacing the "?" symbol with the "-" symbol in the _chemical_name_systematic
 data item value.

 Antanas Vaitkus,
 2017-03-30
;
_cod_original_sg_symbol_Hall     'A 2 -2ac'
_cod_original_sg_symbol_H-M      Aba2
_cod_database_code               1508019