Polymerisation of acrylonitrile with di(organoimido)chromium(vi) complexes
Siemeling, Ulrich; Kölling, Lars; Stammler, Anja; Stammler, Hans-Georg; Kaminski, Eric; Fink, Gerhard; Chemical Communications  (2000) 1177–; doi:10.1039/b002310h

data_7110942
_publ_section_title
;
 Polymerisation of acrylonitrile with di(organoimido)chromium(vi)
 complexes
;
_journal_issue                   13
_journal_name_full               'Chemical Communications'
_journal_page_first              1177
_journal_paper_doi               10.1039/b002310h
_journal_year                    2000
_chemical_formula_sum            'C22 H30 Cr N2'
_chemical_formula_weight         374.48
_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                 100.21(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.471(4)
_cell_length_b                   16.716(10)
_cell_length_c                   14.781(6)
_cell_measurement_reflns_used    22
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      7.9
_cell_measurement_theta_min      2.7
_cell_volume                     2059.9(18)
_computing_cell_refinement       'P3 (1989)'
_computing_data_collection       'P3 (1989)'
_computing_data_reduction        'SHELXTL-PLUS (1990)'
_computing_molecular_graphics    'SHELXTL-PLUS (1990)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.963
_diffrn_measured_fraction_theta_max 0.963
_diffrn_measurement_device       'Siemens P2(1) diffractometer'
_diffrn_measurement_method       Wyckoff-scan
_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  0.0558
_diffrn_reflns_av_sigmaI/netI    0.0947
_diffrn_refln_scan_width         1.6000
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            3886
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.44
_diffrn_standards_interval_count 100
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.561
_exptl_absorpt_correction_T_max  0.478
_exptl_absorpt_correction_T_min  0.429
_exptl_absorpt_correction_type   'semi-empirical from psi-scans'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.208
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             800
_exptl_crystal_size_max          0.6
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.358
_refine_diff_density_min         -0.285
_refine_diff_density_rms         0.070
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     230
_refine_ls_number_reflns         3627
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.1084
_refine_ls_R_factor_gt           0.0570
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0445P)^2^+0.0220P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1050
_refine_ls_wR_factor_ref         0.1222
_reflns_number_gt                2346
_reflns_number_total             3627
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b002310hsup1.cif
_cod_data_source_block           compound2
_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 2.4.2 from
2011-04-26.

'_geom_bond_publ_flag' value 'Y' changed to 'y'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26 (28
times).

'_geom_angle_publ_flag' value 'Y' changed to 'y' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.2 from 2011-04-26 (47 times).

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0445P)^2^+0.0220P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0445P)^2^+0.0220P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7110942