Complexes formed between the quadridentate, heterocyclic molecules 6,6'-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-2,2'-bipyridine (BTBP) and lanthanides(III): implications for the partitioning of actinides(III) and lanthanides(III).
Foreman, Mark R. S.; Hudson, Michael J.; Drew, Michael G. B.; Hill, Clément; Madic, Charles; Dalton transactions (Cambridge, England : 2003)  (2006) 1645–1653; doi:10.1039/b511321k

data_7006493
_publ_section_title
;
 Complexes formed between the quadridentate, heterocyclic molecules
 6,6'-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-2,2'-bipyridine (BTBP) and
 lanthanides(III): implications for the partitioning of actinides(III)
 and lanthanides(III).
;
_journal_issue                   13
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1645
_journal_page_last               1653
_journal_paper_doi               10.1039/b511321k
_journal_year                    2006
_chemical_formula_sum            'C26 H29 Er N12 O9'
_chemical_formula_weight         820.88
_chemical_name_systematic
;
?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
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_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
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_cell_angle_gamma                106.749(10)
_cell_formula_units_Z            2
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_cell_length_b                   10.202(14)
_cell_length_c                   16.868(18)
_cell_measurement_temperature    293(2)
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_computing_cell_refinement       XDS
_computing_data_collection       'XDS (Kabsch, 1991)'
_computing_data_reduction        XDS
_computing_molecular_graphics    PLATON(Spek,1994)
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.910
_diffrn_measurement_device       'Marresearch Image Plate'
_diffrn_measurement_method
'95 frames at 2^o intervals, counting time 2 min.'
_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  0.0506
_diffrn_reflns_av_sigmaI/netI    0.0647
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            8889
_diffrn_reflns_theta_full        25.58
_diffrn_reflns_theta_max         25.58
_diffrn_reflns_theta_min         1.21
_exptl_absorpt_coefficient_mu    2.617
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.502
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;
DIFABS, Walker, N. and Stuart, D., Acta Cryst 1983 A39 158.
;
_exptl_crystal_colour            white
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_exptl_crystal_description       needle
_exptl_crystal_F_000             818
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_exptl_crystal_size_min          0.03
_refine_diff_density_max         2.612
_refine_diff_density_min         -3.008
_refine_diff_density_rms         0.206
_refine_ls_extinction_coef       0.0008(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_all   1.169
_refine_ls_goodness_of_fit_obs   1.195
_refine_ls_matrix_type           full
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_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.169
_refine_ls_restrained_S_obs      1.195
_refine_ls_R_factor_all          0.0812
_refine_ls_R_factor_obs          0.0755
_refine_ls_shift/esd_max         0.008
_refine_ls_shift/esd_mean        0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
w=1/[\s^2^(Fo^2^)+(0.0555P)^2^+30.9921P] where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
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_reflns_number_observed          5228
_reflns_number_total             5631
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            b511321k.txt
_cod_data_source_block           er
_cod_original_cell_volume        1646.6(37)
_cod_original_sg_symbol_H-M      P-1
_cod_original_formula_sum        'C26 H29 Er N12 O9 '
_cod_database_code               7006493