Large ultra-high molecular weight polyethylene spherical particles produced by AlR(3) activated half-sandwich chromium(iii) catalysts.
Sun, Mingtai; Xu, Tieqi; Gao, Wei; Liu, Yang; Wu, Qiaolin; Mu, Ying; Ye, Ling; Dalton transactions (Cambridge, England : 2003) 40 (2011) 10184–10194; doi:10.1039/c1dt10659g

data_7016730
_publ_section_title
;
 Large ultra-high molecular weight polyethylene spherical particles
 produced by AlR(3) activated half-sandwich chromium(iii) catalysts.
;
_journal_issue                   39
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              10184
_journal_page_last               10194
_journal_paper_doi               10.1039/c1dt10659g
_journal_volume                  40
_journal_year                    2011
_chemical_formula_sum            'C24 H35 Cl Cr N O'
_chemical_formula_weight         440.98
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_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                 102.19(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.4593(19)
_cell_length_b                   12.206(2)
_cell_length_c                   21.386(4)
_cell_measurement_reflns_used    5494
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      3.08
_cell_volume                     2413.6(8)
_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 0.994
_diffrn_measured_fraction_theta_max 0.994
_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  0.1268
_diffrn_reflns_av_sigmaI/netI    0.1662
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            21508
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.08
_exptl_absorpt_coefficient_mu    0.598
_exptl_absorpt_correction_T_max  0.9371
_exptl_absorpt_correction_T_min  0.9317
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'ABSCOR by T.Higashi 8 March, 1995'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.214
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             940
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.11
_refine_diff_density_max         1.772
_refine_diff_density_min         -0.644
_refine_diff_density_rms         0.083
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     263
_refine_ls_number_reflns         5494
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.1406
_refine_ls_R_factor_gt           0.0925
_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^)+(0.1197P)^2^+0.8577P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2336
_refine_ls_wR_factor_ref         0.2666
_reflns_number_gt                3033
_reflns_number_total             5494
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1dt10659g.txt
_cod_data_source_block           complex_2
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7016730