Ligand effects in chromium diphosphine catalysed olefin co-trimerisation and diene trimerisation.
Bowen, Lucy E.; Charernsuk, Manutsavin; Hey, Thomas W.; McMullin, Claire L.; Orpen, A. Guy; Wass, Duncan F.; Dalton transactions (Cambridge, England : 2003) 39 (2010) 560–567; doi:10.1039/b913302j

data_7024245
_publ_section_title
;
 Ligand effects in chromium diphosphine catalysed olefin co-trimerisation
 and diene trimerisation.
;
_journal_issue                   2
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              560
_journal_page_last               567
_journal_paper_doi               10.1039/b913302j
_journal_volume                  39
_journal_year                    2010
_chemical_formula_moiety         'C34 H34 Cr N2 O4 P2, 0.75(C H2 Cl2)'
_chemical_formula_sum            'C34.75 H35.5 Cl1.5 Cr N2 O4 P2'
_chemical_formula_weight         712.27
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 121.267(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.8254(7)
_cell_length_b                   16.6151(9)
_cell_length_c                   20.6833(9)
_cell_measurement_reflns_used    30278
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.36
_cell_volume                     3473.6(3)
_computing_cell_refinement       'Apex II (Bruker-AXS, 2007)'
_computing_data_reduction
;
SAINT v7.34A (Bruker-AXS, 2007) & XPREP v2005/4 (Bruker-AXS, 2005)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.366
_diffrn_detector_type            'Bruker-AXS SMART APEX'
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_details      'frames, 0.3\% width'
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Bruker-AXS Kappa'
_diffrn_measurement_method       '\w & \f scans'
_diffrn_measurement_specimen_support
;
glass fibre
;
_diffrn_radiation_collimation    '0.5 mm double pinhole'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71074
_diffrn_reflns_av_R_equivalents  0.0269
_diffrn_reflns_av_sigmaI/netI    0.0274
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            29582
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         3.00
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_current           40
_diffrn_source_power             2
_diffrn_source_size              '0.4 x 8 mm fine focus'
_diffrn_source_target            Mo
_diffrn_source_type              'Bruker-AXS KFF Mo 2K 90\% Ceramic'
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    0.577
_exptl_absorpt_correction_T_max  0.771
_exptl_absorpt_correction_T_min  0.587
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2007/2 (Sheldrick, G.M., 2007)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.362
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1478
_exptl_crystal_size_max          0.94
_exptl_crystal_size_mid          0.85
_exptl_crystal_size_min          0.45
_refine_diff_density_max         1.256
_refine_diff_density_min         -0.369
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     421
_refine_ls_number_reflns         7919
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0431
_refine_ls_R_factor_gt           0.0374
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0463P)^2^+3.8846P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1004
_refine_ls_wR_factor_ref         0.1037
_reflns_number_gt                6957
_reflns_number_total             7919
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b913302j.txt
_cod_data_source_block           twh80_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_diffrn_radiation_probe' value 'X-ray' changed to 'x-ray' 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      'P 21/c'
_cod_database_code               7024245