Salen complexes of zirconium and hafnium: synthesis, structural characterization and polymerization studies
Mandal, Mrinmay; Ramkumar, Venkatachalam; Chakraborty, Debashis; Polymer Chemistry 10 (2019) 3444–; doi:10.1039/C8PY01750F

data_1550800
_publ_section_title
;
 Salen complexes of zirconium and hafnium: synthesis, structural
 characterization and polymerization studies
;
_journal_issue                   25
_journal_name_full               'Polymer Chemistry'
_journal_page_first              3444
_journal_paper_doi               10.1039/C8PY01750F
_journal_volume                  10
_journal_year                    2019
_chemical_formula_moiety         'C40 H32 Cl8 Hf N4 O4 '
_chemical_formula_sum            'C40 H32 Cl8 Hf N4 O4'
_chemical_formula_weight         1094.79
_space_group_IT_number           114
_space_group_name_Hall           'P -4 2n'
_space_group_name_H-M_alt        'P -4 21 c'
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P -4 2n'
_symmetry_space_group_name_H-M   'P -4 21 c'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2018-01-09 deposited with the CCDC.    2019-03-25 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.3471(2)
_cell_length_b                   11.3471(2)
_cell_length_c                   16.1552(5)
_cell_measurement_reflns_used    4626
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      28.34
_cell_measurement_theta_min      2.54
_cell_volume                     2080.09(8)
_computing_cell_refinement       APEXII,Bruker,2004
_computing_data_collection       APEXII,Bruker,2004
_computing_data_reduction        SAINT,Bruker,2004
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.957
_diffrn_measurement_device_type  'Bruker APEXII CCD area detector'
_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  0.0211
_diffrn_reflns_av_sigmaI/netI    0.0374
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            6745
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.39
_diffrn_reflns_theta_min         2.19
_exptl_absorpt_coefficient_mu    3.068
_exptl_absorpt_correction_T_max  0.7489
_exptl_absorpt_correction_T_min  0.4131
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker,2004)'
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.748
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Rectangular
_exptl_crystal_F_000             1080
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.142
_refine_diff_density_min         -0.696
_refine_diff_density_rms         0.076
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.02(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.650
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     129
_refine_ls_number_reflns         2335
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.650
_refine_ls_R_factor_all          0.0301
_refine_ls_R_factor_gt           0.0218
_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^+1.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0713
_refine_ls_wR_factor_ref         0.0835
_reflns_number_gt                1985
_reflns_number_total             2335
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c8py01750f2.cif
_cod_data_source_block           Hf2
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
according to
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 1550799--1550804.cif.
;
_cod_original_sg_symbol_Hall     'P -4 2n '
_cod_original_sg_symbol_H-M      P-42(1)c
_cod_database_code               1550800