Synthesis and Characterization of 3-Cyano- and 3-Nitroformazans, Nitrogen-Rich Analogues of β-Diketimine Ligands
Joe B. Gilroy; Peter O. Otieno; Michael J. Ferguson; Robert McDonald; Robin G. Hicks; Inorganic Chemistry 47 (2008) 1279–1286; doi:10.1021/ic7019445

data_4304450
_publ_section_title
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Synthesis and Characterization of 3-Cyano- and 3-Nitroformazans,
Nitrogen-Rich Analogues of \b-Diketimine Ligands
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              1279
_journal_page_last               1286
_journal_paper_doi               10.1021/ic7019445
_journal_volume                  47
_journal_year                    2008
_chemical_formula_moiety         'C20 H23 N5'
_chemical_formula_sum            'C20 H23 N5'
_chemical_formula_weight         333.43
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   7.1370(5)
_cell_length_b                   16.3529(12)
_cell_length_c                   30.754(2)
_cell_measurement_reflns_used    5552
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      25.83
_cell_measurement_theta_min      2.49
_cell_volume                     3589.3(4)
_computing_cell_refinement       'Bruker SAINT (Bruker, 1997)'
_computing_data_collection       'Bruker SMART (Bruker, 1997)'
_computing_data_reduction        'Bruker SAINT (Bruker, 1997)'
_computing_molecular_graphics    'Bruker SHELXTL (Bruker, 1997)'
_computing_publication_material  'Bruker SHELXTL (Bruker, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      193(2)
_diffrn_detector_area_resol_mean 8.192
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type
'Bruker PLATFORM diffractometer/SMART 1000 CCD area detector'
_diffrn_measurement_method       '\w scans'
_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  0.0614
_diffrn_reflns_av_sigmaI/netI    0.0325
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            25826
_diffrn_reflns_theta_full        26.40
_diffrn_reflns_theta_max         26.40
_diffrn_reflns_theta_min         1.32
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_T_max  0.9924
_exptl_absorpt_correction_T_min  0.9687
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.234
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1424
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.300
_refine_diff_density_min         -0.194
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     232
_refine_ls_number_reflns         3671
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0726
_refine_ls_R_factor_gt           0.0466
_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^)+(0.0846P)^2^+1.0744P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1299
_refine_ls_wR_factor_ref         0.1547
_reflns_number_gt                2670
_reflns_number_total             3671
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ic7019445-file001.cif
_cod_data_source_block           vic0513
_cod_depositor_comments
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The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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_enum 1527 2010-12-29 10:47:43Z saulius 
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_cod_database_code               4304450