Construction of helical networks by using multiple V-shaped mixed ligand systems
Goswami, Arijit; Sengupta, Satirtha; Mondal, Raju; CrystEngComm 14 (2012) 561–; doi:10.1039/c1ce05380a

data_7206903
_publ_section_title
;
 Construction of helical networks by using multiple V-shaped mixed ligand
 systems
;
_journal_issue                   2
_journal_name_full               CrystEngComm
_journal_page_first              561
_journal_paper_doi               10.1039/c1ce05380a
_journal_volume                  14
_journal_year                    2012
_chemical_formula_sum            'C50 H50 N8 Ni O8'
_chemical_formula_weight         949.69
_chemical_name_systematic
;
?
;
_space_group_IT_number           41
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'A 2 -2ab'
_symmetry_space_group_name_H-M   'A b a 2'
_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            4
_cell_length_a                   19.5620(14)
_cell_length_b                   15.8621(12)
_cell_length_c                   15.3525(11)
_cell_measurement_reflns_used    11965
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      24.29
_cell_measurement_theta_min      2.55
_cell_volume                     4763.8(6)
_computing_cell_refinement       'Bruker APEX-2'
_computing_data_collection       'Bruker APEX-2'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 8
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-2 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  0.0307
_diffrn_reflns_av_sigmaI/netI    0.0203
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            28693
_diffrn_reflns_theta_full        24.35
_diffrn_reflns_theta_max         24.35
_diffrn_reflns_theta_min         2.08
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.470
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.817933
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS v.2.03 (Bruker, 2001), R(int)=0.0817 before correction'
_exptl_crystal_colour            Green
_exptl_crystal_density_diffrn    1.324
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Cube
_exptl_crystal_F_000             1992
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.147
_refine_diff_density_min         -0.226
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.176(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.078
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     311
_refine_ls_number_reflns         3489
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.078
_refine_ls_R_factor_all          0.0311
_refine_ls_R_factor_gt           0.0292
_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^)+(0.0357P)^2^+4.6972P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0757
_refine_ls_wR_factor_ref         0.0768
_reflns_number_gt                3302
_reflns_number_total             3489
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c1ce05380a.txt
_cod_data_source_block           11tb20
_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_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      Aba2
_cod_database_code               7206903