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_7006494
_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            'C24 H28 N11 O11 Yb'
_chemical_formula_weight         819.61
_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                 92.105(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.733(9)
_cell_length_b                   22.614(24)
_cell_length_c                   18.073(19)
_cell_measurement_temperature    293(2)
_cell_volume                     3158(6)
_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 0.942
_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  0.0335
_diffrn_reflns_av_sigmaI/netI    0.0335
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            17923
_diffrn_reflns_theta_full        25.74
_diffrn_reflns_theta_max         25.74
_diffrn_reflns_theta_min         1.44
_exptl_absorpt_coefficient_mu    3.036
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.684
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;
DIFABS, Walker, N. and Stuart, D., Acta Cryst 1983 A39 158.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.720
_exptl_crystal_description       needle
_exptl_crystal_F_000             1628
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.04
_refine_diff_density_max         1.380
_refine_diff_density_min         -1.368
_refine_diff_density_rms         0.099
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.250
_refine_ls_goodness_of_fit_obs   1.265
_refine_ls_matrix_type           full
_refine_ls_number_parameters     428
_refine_ls_number_reflns         5704
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.250
_refine_ls_restrained_S_obs      1.265
_refine_ls_R_factor_all          0.0507
_refine_ls_R_factor_obs          0.0456
_refine_ls_shift/esd_max         0.001
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
w=1/[\s^2^(Fo^2^)+(0.0000P)^2^+14.9850P] where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0922
_refine_ls_wR_factor_obs         0.0900
_reflns_number_observed          5335
_reflns_number_total             5704
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            b511321k.txt
_cod_data_source_block           yb
_cod_original_cell_volume        3158.4(60)
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7006494