Cyclopentadienyl chromium diimine and pyridine-imine complexes: ligand-based radicals and metal-based redox chemistry.
Zhou, Wen; Chiang, Linus; Patrick, Brian O.; Storr, Tim; Smith, Kevin M.; Dalton transactions (Cambridge, England : 2003) 41 (2012) 7920–7930; doi:10.1039/c2dt30160a

data_7019298
_publ_section_title
;
 Cyclopentadienyl chromium diimine and pyridine-imine complexes:
 ligand-based radicals and metal-based redox chemistry.
;
_journal_issue                   26
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7920
_journal_page_last               7930
_journal_paper_doi               10.1039/c2dt30160a
_journal_volume                  41
_journal_year                    2012
_chemical_formula_sum            'C20 H21 Cr N2'
_chemical_formula_weight         341.39
_chemical_name_systematic
;
?
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 100.821(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.1264(14)
_cell_length_b                   7.0886(8)
_cell_length_c                   18.898(2)
_cell_measurement_reflns_used    3561
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      22.759
_cell_measurement_theta_min      2.193
_cell_volume                     1727.2(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker X8 APEX II'
_diffrn_measurement_method       'area detector'
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0714
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2546
_diffrn_reflns_theta_full        22.77
_diffrn_reflns_theta_max         22.77
_diffrn_reflns_theta_min         1.10
_exptl_absorpt_coefficient_mu    0.663
_exptl_absorpt_correction_T_max  0.948
_exptl_absorpt_correction_T_min  0.626
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.313
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       irregular
_exptl_crystal_F_000             716
_exptl_crystal_size_max          0.520
_exptl_crystal_size_mid          0.320
_exptl_crystal_size_min          0.080
_refine_diff_density_max         2.163
_refine_diff_density_min         -1.262
_refine_diff_density_rms         0.158
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.14(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.075
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     362
_refine_ls_number_reflns         2546
_refine_ls_number_restraints     451
_refine_ls_restrained_S_all      0.983
_refine_ls_R_factor_all          0.1022
_refine_ls_R_factor_gt           0.0816
_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^)+(0.1128P)^2^+8.3559P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1988
_refine_ls_wR_factor_ref         0.2161
_reflns_number_gt                2146
_reflns_number_total             2546
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c2dt30160a.txt
_cod_data_source_block           ks139_5
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7019298