One electron oxidation of chromium N,N-bis(diarylphosphino)amine and bis(diarylphosphino)methane complexes relevant to ethene trimerisation and tetramerisation.
Bowen, Lucy E.; Haddow, Mairi F.; Orpen, A. Guy; Wass, Duncan F.; Dalton transactions (Cambridge, England : 2003)  (2007) 1160–1168; doi:10.1039/b700559h

data_7005319
_publ_section_title
;
 One electron oxidation of chromium N,N-bis(diarylphosphino)amine and
 bis(diarylphosphino)methane complexes relevant to ethene trimerisation
 and tetramerisation.
;
_journal_issue                   11
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1160
_journal_page_last               1168
_journal_paper_doi               10.1039/b700559h
_journal_year                    2007
_chemical_formula_moiety         'C32 H31 Cr N2 O8 P2, B F4'
_chemical_formula_sum            'C32 H31 B Cr F4 N2 O8 P2'
_chemical_formula_weight         772.34
_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                 101.33(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.398(2)
_cell_length_b                   19.022(4)
_cell_length_c                   18.460(4)
_cell_measurement_reflns_used    3331
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      79.553
_cell_measurement_theta_min      3.371
_cell_volume                     3924.4(14)
_computing_cell_refinement       'Bruker SMART V5.054 (Bruker, 1998)'
_computing_data_collection       'Bruker SMART V5.054 (Bruker, 1998)'
_computing_data_reduction        'Bruker SAINT V6.0 (Bruker, 1998)'
_computing_molecular_graphics    'Bruker SHELXTL V6.1 (Bruker AXS, 2000)'
_computing_publication_material  'Bruker SHELXTL V6.1 (Bruker AXS, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 5.6
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0980
_diffrn_reflns_av_sigmaI/netI    0.0925
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            29906
_diffrn_reflns_theta_full        70.07
_diffrn_reflns_theta_max         70.07
_diffrn_reflns_theta_min         3.37
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.748
_exptl_absorpt_correction_T_max  0.890000
_exptl_absorpt_correction_T_min  0.538660
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2.10'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.307
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1584
_exptl_crystal_size_max          0.09
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.03
_platon_squeeze_details          ' ?'
_refine_diff_density_max         0.445
_refine_diff_density_min         -0.314
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.977
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     502
_refine_ls_number_reflns         7312
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      0.977
_refine_ls_R_factor_all          0.0856
_refine_ls_R_factor_gt           0.0480
_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^)+(0.0466P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1093
_refine_ls_wR_factor_ref         0.1203
_reflns_number_gt                4672
_reflns_number_total             7312
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b700559h.txt
_cod_data_source_block           lb106sadsqueeze
_cod_original_cell_volume        3924.2(14)
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7005319