Strong intramolecular π‒π interactions favor the formation of 2:1 (L:M) lanthanide complexes of tris(2-benzimidazolylmethyl)amine
Wietzke, Raphaël; Mazzanti, Marinella; Chemical Communications  (1999) 209–; doi:10.1039/a807831i

data_7110386
_publ_section_title
;
 Strong intramolecular \p--\p interactions favor the formation of 2:1
 (L:M) lanthanide complexes of tris(2-benzimidazolylmethyl)amine
;
_journal_issue                   2
_journal_name_full               'Chemical Communications'
_journal_page_first              209
_journal_paper_doi               10.1039/a807831i
_journal_year                    1999
_chemical_formula_sum            'C64 H78 Cl3 Eu N16 O15'
_chemical_formula_weight         1569.73
_chemical_name_systematic
;

 ?

;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 111.9290(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.1861(4)
_cell_length_b                   24.8563(6)
_cell_length_c                   16.9481(4)
_cell_measurement_temperature    173(2)
_cell_volume                     7106.9(3)
_computing_cell_refinement       'Siemens XSCANS'
_computing_data_collection       'Siemens XSCANS'
_computing_data_reduction        'Siemens SHELXTL'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measurement_device       'Siemens P4'
_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  0.0835
_diffrn_reflns_av_sigmaI/netI    0.1208
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            32598
_diffrn_reflns_theta_max         26.02
_diffrn_reflns_theta_min         1.53
_exptl_absorpt_coefficient_mu    1.070
_exptl_absorpt_correction_type   SADABS
_exptl_crystal_density_diffrn    1.467
_exptl_crystal_F_000             3232
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.35
_refine_diff_density_max         0.949
_refine_diff_density_min         -0.837
_refine_diff_density_rms         0.107
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.030
_refine_ls_goodness_of_fit_obs   1.094
_refine_ls_matrix_type           full
_refine_ls_number_parameters     892
_refine_ls_number_reflns         12484
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_restrained_S_obs      1.094
_refine_ls_R_factor_all          0.1115
_refine_ls_R_factor_obs          0.0481
_refine_ls_shift/esd_max         0.248
_refine_ls_shift/esd_mean        0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0367P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1076
_refine_ls_wR_factor_obs         0.0865
_reflns_number_observed          7546
_reflns_number_total             12490
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            807831isup1.cif
_cod_data_source_block           Eu(ntb)2(ClO4)3
_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.

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^)+(0.0367P)^2^+0.0000P] 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^)+(0.0367P)^2^+0.0000P] 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)/c
_cod_database_code               7110386