Synthesis and ethylene trimerisation capability of new chromium(II) and chromium(III) heteroscorpionate complexes.
Kilpatrick, Alexander F. R.; Kulangara, Shaneesh Vadake; Cushion, Michael G.; Duchateau, Robbert; Mountford, Philip; Dalton transactions (Cambridge, England : 2003) 39 (2010) 3653–3664; doi:10.1039/b926333k

data_7025286
_publ_section_title
;
 Synthesis and ethylene trimerisation capability of new chromium(II) and
 chromium(III) heteroscorpionate complexes.
;
_journal_issue                   15
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3653
_journal_page_last               3664
_journal_paper_doi               10.1039/b926333k
_journal_volume                  39
_journal_year                    2010
_chemical_formula_moiety         'C18 H27 Cl3 Cr1 N5 Si1, CH2Cl2'
_chemical_formula_sum            'C20 H29 Cl5 Cr N5 Si'
_chemical_formula_weight         596.83
_chemical_name_systematic
;
Cr{HC(Me2pz)2SiMe2N(H)Ph}Cl3 .CH2Cl2
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                75.1113(14)
_cell_angle_beta                 76.7912(14)
_cell_angle_gamma                76.1372(17)
_cell_formula_units_Z            2
_cell_length_a                   8.5884(2)
_cell_length_b                   11.9779(4)
_cell_length_c                   13.6741(5)
_cell_measurement_reflns_used    5667
_cell_measurement_temperature    150
_cell_measurement_theta_max      27
_cell_measurement_theta_min      5
_cell_volume                     1298.79(7)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1997-2001).'
_computing_data_reduction        'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device       'Nonius KappaCCD'
_diffrn_measurement_device_type  Area
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.026
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            10110
_diffrn_reflns_theta_full        26.939
_diffrn_reflns_theta_max         27.489
_diffrn_reflns_theta_min         5.135
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.020
_exptl_absorpt_correction_T_max  0.90
_exptl_absorpt_correction_T_min  0.90
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.526
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             614
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.15
_refine_diff_density_min         -0.40
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.1225
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     293
_refine_ls_number_reflns         4369
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0669
_refine_ls_R_factor_gt           0.0494
_refine_ls_shift/su_max          0.000314
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982)
[weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)]
where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax
Method = Robust Weighting (Prince, 1982)
W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^
A~i~ are:
0.893 0.239 0.725 0.786E-01 0.247
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0578
_refine_ls_wR_factor_gt          0.0467
_refine_ls_wR_factor_ref         0.0448
_reflns_limit_h_max              11
_reflns_limit_h_min              -10
_reflns_limit_k_max              15
_reflns_limit_k_min              -14
_reflns_limit_l_max              17
_reflns_limit_l_min              0
_reflns_number_gt                4716
_reflns_number_total             5903
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.58
_oxford_diffrn_Wilson_scale      3.39
_oxford_refine_ls_r_factor_ref   0.0450
_oxford_refine_ls_scale          0.4699(7)
_oxford_reflns_number_all        5903
_oxford_reflns_threshold_expression_ref I>3.0\s(I)
_cod_data_source_file            b926333k.txt
_cod_data_source_block           compound_11
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 -1 '
_cod_original_formula_sum        'C20 H29 Cl5 Cr1 N5 Si1'
_cod_database_code               7025286