Solid-State and Solution Properties of the Lanthanide Complexes of a New Heptadentate Tripodal Ligand: A Route to Gadolinium Complexes with an Improved Relaxation Efficiency
Yann Bretonnière; Marinella Mazzanti; Jacques Pécaut; Frank A. Dunand; André E. Merbach; Inorganic Chemistry 40 (2001) 6737–6745; doi:10.1021/ic010591+

data_4327604
_publ_section_title
;
 Solid-State and Solution Properties of the Lanthanide Complexes of a New
 Heptadentate Tripodal Ligand: A Route to Gadolinium Complexes with an
 Improved Relaxation Efficiency
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              6737
_journal_page_last               6745
_journal_paper_doi               10.1021/ic010591+
_journal_volume                  40
_journal_year                    2001
_chemical_formula_sum            'C42 H48 Ho2 N8 O21'
_chemical_formula_weight         1330.74
_space_group_IT_number           60
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_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                   12.9007(16)
_cell_length_b                   15.5190(19)
_cell_length_c                   23.378(3)
_cell_measurement_temperature    193(2)
_cell_volume                     4680.4(10)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      193(2)
_diffrn_measured_fraction_theta_full 0.878
_diffrn_measured_fraction_theta_max 0.878
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0370
_diffrn_reflns_av_sigmaI/netI    0.0415
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            18020
_diffrn_reflns_theta_full        29.41
_diffrn_reflns_theta_max         29.41
_diffrn_reflns_theta_min         2.35
_exptl_absorpt_coefficient_mu    3.449
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.889
_exptl_crystal_F_000             2632
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.4
_refine_diff_density_max         0.544
_refine_diff_density_min         -2.711
_refine_diff_density_rms         0.176
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     426
_refine_ls_number_reflns         5687
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0423
_refine_ls_R_factor_gt           0.0268
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0273P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0595
_refine_ls_wR_factor_ref         0.0614
_reflns_number_gt                4174
_reflns_number_total             5687
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic0105912B_06.cif
_cod_data_source_block           struc7
_cod_database_code               4327604