Synthesis, structures and ethylene polymerization behavior of half-metallocene chromium(iii) catalysts bearing salicylaldiminato ligands
Sun, Mingtai; Mu, Ying; Wu, Qiaolin; Gao, Wei; Ye, Ling; New Journal of Chemistry 34 (2010) 2979–; doi:10.1039/c0nj00439a

data_7053673
_publ_section_title
;
 Synthesis, structures and ethylene polymerization behavior of
 half-metallocene chromium(iii) catalysts bearing salicylaldiminato
 ligands
;
_journal_issue                   12
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              2979
_journal_paper_doi               10.1039/c0nj00439a
_journal_volume                  34
_journal_year                    2010
_chemical_formula_sum            'C25 H35 Br Cl4 Cr N O'
_chemical_formula_weight         639.25
_chemical_name_systematic
;
?
;
_space_group_IT_number           18
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 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                   12.321(3)
_cell_length_b                   25.157(5)
_cell_length_c                   9.3501(19)
_cell_measurement_temperature    293(2)
_cell_volume                     2898.2(11)
_computing_cell_refinement       'RAPID AUTO'
_computing_data_collection       'RAPID AUTO'
_computing_data_reduction        'RAPID AUTO'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean '100x100 microns'
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID IP diffractometer'
_diffrn_measurement_method       'Oscillation 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  0.0573
_diffrn_reflns_av_sigmaI/netI    0.0564
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            28218
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.18
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  none
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    2.160
_exptl_absorpt_correction_T_max  0.8129
_exptl_absorpt_correction_T_min  0.7376
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'ABSCOR by T.Higashi 8 March, 1995'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.465
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1308
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.363
_refine_diff_density_min         -0.455
_refine_diff_density_rms         0.061
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.023(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     325
_refine_ls_number_reflns         6618
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0645
_refine_ls_R_factor_gt           0.0414
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0409P)^2^+0.8606P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0880
_refine_ls_wR_factor_ref         0.0966
_reflns_number_gt                5021
_reflns_number_total             6618
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0nj00439a.txt
_cod_data_source_block           complex_4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2
_cod_database_code               7053673