Asymmetric Bis(formamidinate) Group 4 Complexes: Synthesis, Structure and Their Reactivity in the Polymerization of α-Olefins.
Kulkarni, Naveen V.; Elkin, Tatyana; Tumaniskii, Boris; Botoshansky, Mark; Shimon, Linda J. W.; Eisen, Moris S.; Organometallics 33 (2014) 3119–; doi:10.1021/om500345r

data_4083570
_publ_section_title
;
 Asymmetric Bis(formamidinate) Group 4 Complexes: Synthesis, Structure and
 Their Reactivity in the Polymerization of \a-Olefins.
;
_journal_issue                   12
_journal_name_full               Organometallics
_journal_page_first              3119
_journal_paper_doi               10.1021/om500345r
_journal_volume                  33
_journal_year                    2014
_chemical_formula_moiety         'C46 H64 N4 Zr'
_chemical_formula_sum            'C46 H64 N4 Zr'
_chemical_formula_weight         764.23
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                   11.2322(7)
_cell_length_b                   12.0886(7)
_cell_length_c                   31.609(2)
_cell_measurement_reflns_used    9993
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.45
_cell_volume                     4291.9(5)
_computing_cell_refinement       'Bruker Apex2'
_computing_data_collection       'Bruker Apex2'
_computing_data_reduction        'Bruker Apex2'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker KappaApexII CCD'
_diffrn_measurement_method       'phi and omega 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  0.0427
_diffrn_reflns_av_sigmaI/netI    0.0324
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       41
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            69847
_diffrn_reflns_theta_full        27.87
_diffrn_reflns_theta_max         27.87
_diffrn_reflns_theta_min         1.80
_exptl_absorpt_coefficient_mu    0.291
_exptl_absorpt_correction_T_max  0.9660
_exptl_absorpt_correction_T_min  0.9660
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.183
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             1632
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.404
_refine_diff_density_min         -0.271
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.016(18)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     488
_refine_ls_number_reflns         10173
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0307
_refine_ls_R_factor_gt           0.0270
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0264P)^2^+1.1037P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0581
_refine_ls_wR_factor_ref         0.0597
_reflns_number_gt                9547
_reflns_number_total             10173
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om500345r_si_002.cif
_cod_data_source_block           me2
_cod_depositor_comments
'Adding full bibliography for 4083562--4083570.cif.'
_cod_original_cell_volume        4292.0(5)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               4083570