Novel Cr-PNP complexes as catalysts for the trimerisation of ethylene
McGuinness, David S.; Wasserscheid, Peter; Keim, Wilhelm; Hu, Chunhua; Englert, Ulli; Dixon, John T.; Grove, Cronje; Chemical Communications (Cambridge, United Kingdom)  (2003) 334–335; doi:10.1039/b210878j

data_7103955
_publ_section_title
;
 Novel Cr-PNP complexes as catalysts for the trimerisation of ethylene
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   3
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              334
_journal_page_last               335
_journal_paper_doi               10.1039/b210878j
_journal_year                    2003
_chemical_formula_sum            'C30 H35 Cl3 Cr N O P2 S'
_chemical_formula_weight         677.95
_chemical_name_common            'Compound 1'
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             15-02-02
_audit_creation_method           SHELXTL
_audit_update_record
; 
?
;
_cell_angle_alpha                90.00
_cell_angle_beta                 100.923(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   27.667(7)
_cell_length_b                   14.751(4)
_cell_length_c                   16.512(4)
_cell_measurement_reflns_used    28626
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      26.06
_cell_measurement_theta_min      2.10
_cell_volume                     6617(3)
_computing_cell_refinement       'SMART (Bruker, 2001)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        'SAINT+ (Bruker, 1999)'
_computing_molecular_graphics    'PLATON (Spek, 1990)'
_computing_publication_material  'SHELXTL (Sheldrick, 1998)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 1998)'
_computing_structure_solution    'SHELXTL (Sheldrick, 1998)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker SMART APEX CCD diffractometer'
_diffrn_measurement_method       '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  0.0662
_diffrn_reflns_av_sigmaI/netI    0.0652
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            28626
_diffrn_reflns_theta_full        26.06
_diffrn_reflns_theta_max         26.06
_diffrn_reflns_theta_min         2.10
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.772
_exptl_absorpt_correction_T_max  1.000000
_exptl_absorpt_correction_T_min  0.817901
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS (1996)'
_exptl_crystal_colour            blue-purple
_exptl_crystal_density_diffrn    1.361
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2808.0
_exptl_crystal_size_max          0.64
_exptl_crystal_size_mid          0.39
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.492
_refine_diff_density_min         -0.725
_refine_diff_density_rms         0.077
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     355
_refine_ls_number_reflns         6532
_refine_ls_number_restraints     7
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0778
_refine_ls_R_factor_gt           0.0521
_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^)+(0.0687P)^2^+6.1765P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1361
_refine_ls_wR_factor_ref         0.1512
_reflns_number_gt                4607
_reflns_number_total             6532
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b210878j.txt
_cod_data_source_block           dm1d
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7103955