Vanadyl complexes bearing bi-dentate phenoxyimine ligands: synthesis, structural studies and ethylene polymerization capability.
Ma, Jing; Zhao, Ke-Qing; Walton, Mark J.; Wright, Joseph A.; Frese, Josef W. A.; Elsegood, Mark R. J.; Xing, Qifeng; Sun, Wen-Hua; Redshaw, Carl; Dalton transactions (Cambridge, England : 2003) 43 (2014) 8300–8310; doi:10.1039/c4dt00021h

data_7029699
_publ_section_title
;
 Vanadyl complexes bearing bi-dentate phenoxyimine ligands: synthesis,
 structural studies and ethylene polymerization capability.
;
_journal_issue                   22
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              8300
_journal_page_last               8310
_journal_paper_doi               10.1039/c4dt00021h
_journal_volume                  43
_journal_year                    2014
_chemical_formula_moiety         'C51 H56 N2 O8 V2'
_chemical_formula_sum            'C51 H56 N2 O8 V2'
_chemical_formula_weight         926.86
_space_group_IT_number           2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                71.25(3)
_cell_angle_beta                 71.42(3)
_cell_angle_gamma                74.94(3)
_cell_formula_units_Z            2
_cell_length_a                   10.169(2)
_cell_length_b                   12.960(3)
_cell_length_c                   20.218(4)
_cell_measurement_reflns_used    17326
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.00
_cell_measurement_theta_min      1.69
_cell_volume                     2354.6(10)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_molecular_graphics    'XP in Siemens SHELXTL (Sheldrick, 1994)'
_computing_publication_material  'SHELX97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'MM007-HF CCD(Saturn 724+)'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_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  0.0574
_diffrn_reflns_av_unetI/netI     0.0599
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            17326
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.69
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  none
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    0.452
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.6363
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.307
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             972
_exptl_crystal_size_max          0.443
_exptl_crystal_size_mid          0.282
_exptl_crystal_size_min          0.254
_refine_diff_density_max         0.324
_refine_diff_density_min         -0.303
_refine_diff_density_rms         0.057
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.072
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     577
_refine_ls_number_reflns         8194
_refine_ls_number_restraints     756
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_gt           0.0464
_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^)+(0.0440P)^2^+0.9953P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1112
_refine_ls_wR_factor_ref         0.1164
_reflns_number_gt                7318
_reflns_number_total             8194
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4dt00021h2.cif
_cod_data_source_block           13
_cod_depositor_comments
'Adding full bibliography for 7029687--7029699.cif.'
_cod_database_code               7029699
_refine_ls_r_factor_ref          0.0536